<div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><div class="t m0 x0 h1 y0 ff1 fs0 fc0 sc0 ls1 ws0">Vitor Gabriel Vieira Costa </div><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls1 ws0">João Paulo de Sales Pimenta<span class="fs1"> </span></div><div class="t m0 x2 h2 y2 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y3 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y4 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y5 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y6 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y7 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y8 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y9 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 ya ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 yb ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 yc ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x3 h3 yd ff2 fs2 fc0 sc0 ls1 ws0">Experiência 3:<span class="_0 blank"></span> Estequiomet<span class="_0 blank"></span>ria </div><div class="t m0 x2 h3 ye ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h3 yf ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h3 y10 ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h3 y11 ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x5 h3 y12 ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x6 h1 y13 ff1 fs0 fc0 sc0 ls1 ws0">Relatório referente as atividades realizadas </div><div class="t m0 x7 h1 y14 ff1 fs0 fc0 sc0 ls1 ws0">no laboratório de Química Geral no dia </div><div class="t m0 x8 h1 y15 ff1 fs0 fc0 sc0 ls1 ws0">18/03/2016. </div><div class="t m0 x2 h1 y16 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y17 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y18 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y19 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y1a ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y1b ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x9 h1 y1c ff1 fs0 fc0 sc0 ls1 ws0">Universidade Federal de Minas Gerais <span class="ff3 ls0">\u2013</span> UFMG </div><div class="t m0 xa h1 y1d ff1 fs0 fc0 sc0 ls1 ws0">Departamento de Química </div><div class="t m0 xb h1 y1e ff1 fs0 fc0 sc0 ls1 ws0">Química Geral </div><div class="t m0 xc h1 y1f ff1 fs0 fc0 sc0 ls1 ws0">Prof.: Marcelo Andrade Chaga<span class="_0 blank"></span>s </div><div class="t m0 x4 h1 y20 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y21 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y22 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y23 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y24 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y25 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 xd h1 y26 ff1 fs0 fc0 sc0 ls1 ws0">Belo Horizonte </div><div class="t m0 xe h1 y27 ff1 fs0 fc0 sc0 ls1 ws0">2016 </div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div> <div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><div class="t m0 x0 h1 y0 ff1 fs0 fc0 sc0 ls1 ws0">Vitor Gabriel Vieira Costa </div><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls1 ws0">João Paulo de Sales Pimenta<span class="fs1"> </span></div><div class="t m0 x2 h2 y2 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y3 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y4 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y5 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y6 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y7 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y8 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 y9 ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 ya ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 yb ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h2 yc ff1 fs1 fc0 sc0 ls1 ws0"> </div><div class="t m0 x3 h3 yd ff2 fs2 fc0 sc0 ls1 ws0">Experiência 3:<span class="_0 blank"></span> Estequiomet<span class="_0 blank"></span>ria </div><div class="t m0 x2 h3 ye ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h3 yf ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h3 y10 ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h3 y11 ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x5 h3 y12 ff2 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y13 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y14 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y15 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y16 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y17 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y18 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y19 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y1a ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y1b ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y1c ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y1d ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y1e ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 h1 y1f ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y20 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y21 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y22 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y23 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h1 y24 ff1 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 xd h1 y25 ff1 fs0 fc0 sc0 ls1 ws0">Belo Horizonte </div><div class="t m0 xf h4 y28 ff4 fs1 fc0 sc0 ls2 ws1">2016<span class="ls1 ws0"> </span></div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div> <div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><div class="t m0 x10 h5 y29 ff4 fs3 fc0 sc0 ls1 ws0">1 </div><div class="t m0 x4 h5 y2a ff5 fs3 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 y2b ff4 fs2 fc0 sc0 ls1 ws0">Introdução <span class="_1 blank"> </span><span class="v1"> </span></div><div class="t m0 x11 h7 y2c ff4 fs0 fc0 sc0 ls1 ws0">A <span class="_2 blank"> </span>estequiometria <span class="_2 blank"> </span>tem <span class="_2 blank"> </span>como <span class="_2 blank"> </span>base <span class="_2 blank"> </span>as <span class="_2 blank"> </span>leis <span class="_2 blank"> </span>que <span class="_2 blank"> </span>garantem <span class="_2 blank"> </span>as <span class="_2 blank"> </span>proporções <span class="_2 blank"> </span>definidas </div><div class="t m0 x4 h7 y2d ff4 fs0 fc0 sc0 ls1 ws0">nas reações químicas, são elas: </div><div class="t m0 x11 h7 y2e ff4 fs0 fc0 sc0 ls1 ws0">Lei <span class="_3 blank"> </span>da <span class="_3 blank"> </span>Conservação <span class="_3 blank"> </span>das <span class="_3 blank"> </span>Massas <span class="_3 blank"> </span><span class="ff6 ls0">\u2013</span> <span class="_3 blank"> </span>Lei <span class="_3 blank"> </span>de <span class="_3 blank"> </span>Lavoisier <span class="_3 blank"> </span><span class="ff6 ls0">\u2013</span> <span class="_3 blank"> </span>em <span class="_3 blank"> </span>uma <span class="_3 blank"> </span>reação <span class="_3 blank"> </span>química </div><div class="t m0 x4 h7 y2f ff4 fs0 fc0 sc0 ls1 ws0">que <span class="_3 blank"> </span>se <span class="_3 blank"> </span>processe <span class="_4 blank"> </span>em <span class="_3 blank"> </span>um <span class="_3 blank"> </span>sistema <span class="_3 blank"> </span>fechado, <span class="_3 blank"> </span>a <span class="_3 blank"> </span>massa <span class="_4 blank"> </span>permanece <span class="_3 blank"> </span>constante, <span class="_3 blank"> </span>ou <span class="_3 blank"> </span>seja, <span class="_3 blank"> </span>a </div><div class="t m0 x4 h7 y30 ff4 fs0 fc0 sc0 ls1 ws0">soma das massas dos reagentes é igual á soma das massas dos produtos: </div><div class="t m0 x11 h7 y31 ff4 fs0 fc0 sc0 ls3 ws0"> <span class="ls1 ws2 v2">M</span><span class="fs4 ls1 v3">reagentes </span><span class="ls1 v2">= M<span class="fs4 v4">prod<span class="_0 blank"></span>utos </span></span></div><div class="t m0 x11 h7 y32 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x11 h7 y33 ff4 fs0 fc0 sc0 ls1 ws0">Lei <span class="_5 blank"> </span>das <span class="_5 blank"> </span>Proporções <span class="_6 blank"> </span>Definidas <span class="ff6 ls0">\u2013</span> <span class="_6 blank"> </span>Lei <span class="_6 blank"> </span>de P<span class="_0 blank"></span>roust <span class="ff6 ws2">\u2013</span> <span class="_6 blank"> </span>quando, <span class="_6 blank"> </span>em <span class="_6 blank"> </span>várias reações </div><div class="t m0 x4 h7 y34 ff4 fs0 fc0 sc0 ls1 ws0">químicas, <span class="_7 blank"> </span>duas <span class="_7 blank"> </span>substâncias <span class="_7 blank"> </span>se <span class="_7 blank"> </span>reúnem<span class="_8 blank"> </span> <span class="_7 blank"> </span>para <span class="_7 blank"> </span>formar <span class="_7 blank"> </span>um <span class="_7 blank"> </span>composto, <span class="_7 blank"> </span>semp<span class="_8 blank"> </span>re<span class="_8 blank"> </span> <span class="_7 blank"> </span>o <span class="_7 blank"> </span>fazem <span class="_9 blank"> </span>em </div><div class="t m0 x4 h7 y35 ff4 fs0 fc0 sc0 ls1 ws0">uma mesma proporção; </div><div class="t m0 x11 h7 y36 ff4 fs0 fc0 sc0 ls1 ws0">Lei <span class="_9 blank"> </span>das <span class="_9 blank"> </span>Proporções <span class="_9 blank"> </span>Múltiplas <span class="_2 blank"> </span><span class="ff6 ls0">\u2013</span> <span class="_9 blank"> </span>Lei <span class="_9 blank"> </span>de <span class="_9 blank"> </span>Dalton <span class="_9 blank"> </span><span class="ff6 ls0">\u2013</span> <span class="_9 blank"> </span>se <span class="_9 blank"> </span>a<span class="_8 blank"> </span> <span class="_9 blank"> </span>massa <span class="_9 blank"> </span>de <span class="_9 blank"> </span>um <span class="_9 blank"> </span>elemento <span class="_9 blank"> </span>for </div><div class="t m0 x4 h7 y37 ff4 fs0 fc0 sc0 ls1 ws0">fixa <span class="_9 blank"> </span>e <span class="_9 blank"> </span>ela <span class="_2 blank"> </span>combinar <span class="_9 blank"> </span>com <span class="_2 blank"> </span>diferentes <span class="_7 blank"> </span>m<span class="_8 blank"> </span>assas <span class="_7 blank"> </span>d<span class="_8 blank"> </span>e <span class="_9 blank"> </span>outro <span class="_9 blank"> </span>elemento, <span class="_9 blank"> </span>para <span class="_9 blank"> </span>f<span class="_8 blank"> </span>ormar <span class="_9 blank"> </span>compostos </div><div class="t m0 x4 h7 y38 ff4 fs0 fc0 sc0 ls1 ws0">diferentes, então a relação entre estas massas são de números intei<span class="_0 blank"></span>ros e pequenos.<span class="_8 blank"> </span> </div><div class="t m0 x11 h7 y39 ff4 fs0 fc0 sc0 ls1 ws0">Contudo, n<span class="_8 blank"> </span>a prática, <span class="_8 blank"> </span>é po<span class="_8 blank"> </span>ssível estimar a <span class="_8 blank"> </span>massa <span class="_8 blank"> </span>dos <span class="_8 blank"> </span>produtos, <span class="_8 blank"> </span>tendo em <span class="_8 blank"> </span>mãos, a </div><div class="t m0 x4 h7 y3a ff4 fs0 fc0 sc0 ls1 ws0">massa dos <span class="_8 blank"> </span>reagentes e a p<span class="_8 blank"> </span>roporção e<span class="_8 blank"> </span>stequiométrica. Além d<span class="_8 blank"> </span>isso, em uma <span class="_8 blank"> </span>reação, pode </div><div class="t m0 x4 h7 y3b ff4 fs0 fc0 sc0 ls1 ws0">haver <span class="_7 blank"> </span>um <span class="_7 blank"> </span>reag<span class="_0 blank"></span>ente <span class="_7 blank"> </span>limitante <span class="_8 blank"> </span>e <span class="_7 blank"> </span>um <span class="_7 blank"> </span>em <span class="_8 blank"> </span>e<span class="_8 blank"> </span>xcesso, <span class="_7 blank"> </span>sendo <span class="_7 blank"> </span>que<span class="_0 blank"></span>, <span class="_7 blank"> </span>aquele <span class="_8 blank"> </span>deve <span class="_7 blank"> </span>ser <span class="_7 blank"> </span>consumido </div><div class="t m0 x4 h7 y3c ff4 fs0 fc0 sc0 ls1 ws0">perto do <span class="_8 blank"> </span>total, pois, geralmente, e<span class="_8 blank"> </span>le é o<span class="_8 blank"> </span> elemento de<span class="_8 blank"> </span> custo mais <span class="_8 blank"> </span>elevado e isso <span class="_8 blank"> </span>pode ser </div><div class="t m0 x4 h7 y3d ff4 fs0 fc0 sc0 ls1 ws0">alcançado, <span class="_a blank"> </span>graças <span class="_a blank"> </span>ao <span class="_a blank"> </span>cálculo <span class="_a blank"> </span>estequiométrico, <span class="_a blank"> </span>que <span class="_a blank"> </span>balanceia <span class="_b blank"> </span>as <span class="_b blank"> </span>proporçõe<span class="_8 blank"> </span>s <span class="_b blank"> </span>e <span class="_a blank"> </span>as </div><div class="t m0 x4 h7 y3e ff4 fs0 fc0 sc0 ls1 ws0">massas até que a quantidade de produto necessária seja atingida. </div><div class="t m0 x11 h7 y3f ff4 fs0 fc0 sc0 ls1 ws0">A proporção e<span class="_8 blank"> </span>stequiométrica será <span class="_8 blank"> </span>o que iremos <span class="_8 blank"> </span>verificar no experimento a <span class="_8 blank"> </span>seguir, </div><div class="t m0 x4 h7 y40 ff4 fs0 fc0 sc0 ls1 ws0">através de um dos métodos capazes de identificar se está correto ou não. </div><div class="t m0 x11 h7 y41 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y42 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y43 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y44 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y45 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y46 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y47 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y48 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y49 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y4a ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y4b ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y4c ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y4d ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y4e ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x12 h7 y4f ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y50 ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span> </div><div class="t m0 x4 h7 y51 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y23 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y52 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y53 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y54 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y55 ff4 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div> <div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><div class="t m0 x10 h5 y29 ff4 fs3 fc0 sc0 ls1 ws0">2 </div><div class="t m0 x4 h5 y2a ff5 fs3 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y56 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 y57 ff4 fs2 fc0 sc0 ls1 ws3">Objetivo<span class="fs0 ws0"> </span></div><div class="t m0 x11 h7 y58 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x11 h7 y59 ff4 fs0 fc0 sc0 ls1 ws0">Identificar <span class="_7 blank"> </span>a <span class="_7 blank"> </span>relação <span class="_7 blank"> </span>estequiométrica <span class="_7 blank"> </span>entre <span class="_7 blank"> </span>os <span class="_7 blank"> </span>elementos <span class="_7 blank"> </span>químicos, <span class="_7 blank"> </span>sendo <span class="_7 blank"> </span>eles, <span class="_7 blank"> </span>o </div><div class="t m0 x4 h7 y5a ff4 fs0 fc0 sc0 ls1 ws0">sulfato de cobre e o hidróxido de sódio. </div><div class="t m0 x11 h7 y5b ff4 fs0 fc0 sc0 ls1 ws0">Através <span class="_2 blank"> </span>do <span class="_2 blank"> </span>m<span class="_8 blank"> </span>étodo <span class="_2 blank"> </span>de <span class="_2 blank"> </span>me<span class="_8 blank"> </span>dida <span class="_2 blank"> </span>da <span class="_2 blank"> </span>a<span class="_8 blank"> </span>ltura <span class="_2 blank"> </span>do <span class="_2 blank"> </span>precipitado <span class="_2 blank"> </span>fo<span class="_8 blank"> </span>rmado, <span class="_2 blank"> </span>o <span class="_2 blank"> </span>hidróxido <span class="_2 blank"> </span>de<span class="_8 blank"> </span> </div><div class="t m0 x4 h7 y5c ff4 fs0 fc0 sc0 ls1 ws0">cobre, dete<span class="_8 blank"> </span>rminar se a <span class="_8 blank"> </span>relação <span class="_8 blank"> </span>altura/volume <span class="_8 blank"> </span>desse <span class="_8 blank"> </span>produto é<span class="_8 blank"> </span> proporcional á <span class="_8 blank"> </span>massa <span class="_8 blank"> </span>dos </div><div class="t m0 x4 h7 y6 ff4 fs0 fc0 sc0 ls1 ws0">reagentes. </div><div class="t m0 x4 h7 y5d ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 y5e ff4 fs2 fc0 sc0 ls1 ws0">Materiais e reagentes<span class="_0 blank"></span> </div><div class="t m0 x4 h6 y5f ff4 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y60 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Estante para tubos de ensaio; </span></div><div class="t m0 x4 h7 y61 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Pipetas graduadas (10,00 ± 0,05 mL); </span></div><div class="t m0 x4 h7 y62 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Régua graduada em milímetros (30,00 ± 0,05 cm); </span></div><div class="t m0 x4 h7 y63 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Tubos de Nessler 18 x 150 mm; </span></div><div class="t m0 x4 h7 y64 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Béquer (50 ml); </span></div><div class="t m0 x4 h7 y65 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Béquer (100 ml); </span></div><div class="t m0 x4 h7 y66 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Bastão de vidro; </span></div><div class="t m0 x4 h7 y67 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Pipetador/pêra; </span></div><div class="t m0 x4 h7 y68 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Frasco para armazenamento de resíduo; </span></div><div class="t m0 x4 h8 y69 ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Solução de CuSO<span class="fs4 ls4">4 <span class="_8 blank"> </span></span>0,5 mol L<span class="fs4 ws5 v5">-1</span> (40 mL); </span></div><div class="t m0 x4 h8 y6a ff7 fs0 fc0 sc0 ls1 ws4">\uf0b7<span class="ff4 ws0"> <span class="_d blank"> </span>Solução de NaOH 0,5 mol L<span class="_8 blank"> </span><span class="fs4 ws5 v5">-1</span> (50 mL). </span></div><div class="t m0 x4 h7 y6b ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y6c ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y6d ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y6e ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y6f ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y70 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y71 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y72 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y73 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y74 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y75 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y76 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y77 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y78 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y79 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y7a ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y7b ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y7c ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y7d ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y7e ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y7f ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y80 ff4 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div> <div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img fetchpriority="low" loading="lazy" class="bi x13 y81 w1 h9" alt="" src="https://files.passeidireto.com/0a7c0c44-a501-40a6-9aeb-b904aa0249ef/bg5.png"><div class="t m0 x10 h5 y29 ff4 fs3 fc0 sc0 ls1 ws0">3 </div><div class="t m0 x4 h5 y2a ff5 fs3 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 y2b ff4 fs2 fc0 sc0 ls1 ws0">Procedimentos </div><div class="t m0 x4 h6 y82 ff4 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 ha y2c ff8 fs0 fc0 sc0 ls5 ws0"> <span class="ff4 ls1">Colocou-se <span class="_5 blank"> </span>em <span class="_6 blank"> </span>uma<span class="_8 blank"> </span> <span class="_6 blank"> </span>estante <span class="_5 blank"> </span>para <span class="_6 blank"> </span>tubos de <span class="_6 blank"> </span>ensaio, <span class="_6 blank"> </span>7 tubos <span class="_6 blank"> </span>de <span class="_6 blank"> </span>Nessler, qu<span class="_0 blank"></span>e </span></div><div class="t m0 x4 h7 y2d ff4 fs0 fc0 sc0 ls1 ws0">possuem <span class="_e blank"> </span>o <span class="_a blank"> </span>fundo <span class="_e blank"> </span>chato. <span class="_a blank"> </span>Ad<span class="_8 blank"> </span>icionou-se <span class="_e blank"> </span>com <span class="_e blank"> </span>uma <span class="_a blank"> </span>pipeta <span class="_e blank"> </span>graduada <span class="_a blank"> </span>em <span class="_e blank"> </span>cada <span class="_e blank"> </span>tubo, </div><div class="t m0 x4 h7 y2e ff4 fs0 fc0 sc0 ls1 ws0">sucessivamente, <span class="_9 blank"> </span>11,0; <span class="_9 blank"> </span>10,0; <span class="_2 blank"> </span>8,0; <span class="_9 blank"> </span>6.0; <span class="_2 blank"> </span>4,0; <span class="_9 blank"> </span>2,0mL <span class="_9 blank"> </span>de <span class="_2 blank"> </span>solução <span class="_9 blank"> </span>de <span class="_2 blank"> </span>NaOH <span class="_9 blank"> </span>0,5 <span class="_9 blank"> </span>mo<span class="_8 blank"> </span>l <span class="_9 blank"> </span>L<span class="_7 blank"> </span><span class="ff6 fs4 ls8 ws6 v5">\u22121</span>. <span class="_9 blank"> </span>Do </div><div class="t m0 x4 h8 y2f ff4 fs0 fc0 sc0 ls1 ws0">mesmo modo, adicio<span class="_0 blank"></span>nou<span class="_8 blank"> </span>-se 1,0; <span class="_5 blank"> </span>2,0; 4,0; <span class="_5 blank"> </span>6,0; 8,0; 10,0mL d<span class="_0 blank"></span>e CuSO<span class="fs4 ws5 v4">4</span> 0,5 mol L<span class="fs4 ws5 v5">-1</span><span class="ls9">, </span></div><div class="t m0 x4 h7 y30 ff4 fs0 fc0 sc0 ls1 ws0">sucessivamente, nesses tubos. </div><div class="t m0 x4 h7 y31 ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span>Com <span class="_9 blank"> </span>isso,<span class="_8 blank"> </span> <span class="_9 blank"> </span>agitaram-se <span class="_9 blank"> </span>o<span class="_8 blank"> </span>s <span class="_9 blank"> </span>tubos <span class="_2 blank"> </span>e <span class="_9 blank"> </span>deixaram <span class="_9 blank"> </span>e<span class="_8 blank"> </span>m <span class="_2 blank"> </span>repouso <span class="_9 blank"> </span>para <span class="_2 blank"> </span>que <span class="_9 blank"> </span>formasse<span class="_8 blank"> </span>m <span class="_9 blank"> </span><span class="lsa">a </span></div><div class="t m0 x4 h7 y83 ff4 fs0 fc0 sc0 ls1 ws0">precipitação <span class="_7 blank"> </span>do <span class="_8 blank"> </span>produto <span class="_7 blank"> </span>v<span class="_0 blank"></span>isível <span class="_8 blank"> </span>e <span class="_7 blank"> </span>de <span class="_8 blank"> </span>co<span class="_8 blank"> </span>loração <span class="_8 blank"> </span>azul<span class="_8 blank"> </span>, <span class="_7 blank"> </span>sendo e<span class="_8 blank"> </span>le, <span class="_8 blank"> </span>o <span class="_7 blank"> </span>Cu(OH)<span class="fs4 ws5 v4">2</span>. <span class="_8 blank"> </span>Essa <span class="_7 blank"> </span>reação </div><div class="t m0 x4 h7 y32 ff4 fs0 fc0 sc0 ls1 ws0">foi de dupla troca e de formação de precipitado (sal de metal + base)<span class="_0 blank"></span>.<span class="_8 blank"> </span> </div><div class="t m0 x4 h7 y33 ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span>Após o<span class="_8 blank"> </span> repouso e a<span class="_8 blank"> </span> f<span class="_8 blank"> </span>ormação de <span class="_8 blank"> </span>grande parte do<span class="_8 blank"> </span> precipitado, mediu<span class="_8 blank"> </span>-se <span class="_8 blank"> </span>com uma </div><div class="t m0 x4 h7 y34 ff4 fs0 fc0 sc0 ls1 ws0">régua a altura do precipitado e os resultados obtidos estão na tabela 1. </div><div class="t m0 x4 h7 y35 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 y84 ff4 fs2 fc0 sc0 ls1 ws0">Resultados e Di<span class="_0 blank"></span>scussão </div><div class="t m0 x4 h7 y85 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 ha y86 ff8 fs0 fc0 sc0 ls1 ws0">Gráfico 1: Variação da altura do precipitad<span class="_0 blank"></span>o em função do volume da solução de </div><div class="t m0 x4 ha y87 ff8 fs0 fc0 sc0 ls1 ws0">NaOH adicionado: </div><div class="t m0 x4 ha y88 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="c x13 y89 w2 hb"><div class="t m0 x14 hc y8a ff8 fs4 fc0 sc0 ls1 ws0"> </div></div><div class="t m0 x4 hd y8b ff4 fs5 fc0 sc0 ls1 ws0"> </div><div class="t m0 x15 h7 y8c ff7 fs3 fc0 sc0 ls1 ws7">\uf0b7<span class="ff4 ls6 ws0"> <span class="fs0 ls1 ws2">CuSO<span class="fs4 ws5 v4">4</span><span class="ws0">(aq) + 2NaOH(aq) -> Cu(OH)<span class="fs4 ls7 v4">2</span>(s) + Na<span class="fs4 ws5 v4">2</span><span class="lsb ws8">SO</span><span class="fs4 ws5 v4">4</span></span>(aq)</span><span class="ls1"> </span></span></div><div class="t m0 x2 ha y8d ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y8e ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y8f ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y90 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y91 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y92 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y93 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y94 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y95 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y96 ff8 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div> <div id="pf6" class="pf w0 h0" data-page-no="6"><div class="pc pc6 w0 h0"><img fetchpriority="low" loading="lazy" class="bi x16 y97 w3 he" alt="" src="https://files.passeidireto.com/0a7c0c44-a501-40a6-9aeb-b904aa0249ef/bg6.png"><div class="t m0 x10 h5 y29 ff4 fs3 fc0 sc0 ls1 ws0">4 </div><div class="t m0 x4 h5 y2a ff5 fs3 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y56 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y98 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2 ha y99 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 ha y9a ff8 fs0 fc0 sc0 ls1 ws0">Tabela 1: volume dos reagentes e altura do precipitado. </div><div class="t m0 x4 ha y9b ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="c x17 y9c w4 hf"><div class="t m0 x16 ha y9d ff8 fs0 fc0 sc0 lsc ws9">Tubo<span class="ls1 ws0"> </span></div></div><div class="c x18 y9c w5 hf"><div class="t m0 x19 ha y9d ff8 fs0 fc0 sc0 ls1 ws0">Volume / mL </div><div class="t m0 x1a ha y9e ff8 fs0 fc0 sc0 ls1 ws2">CuSO<span class="fs4 lsd ws0">4 </span><span class="ws0">0,5 mol L<span class="ff9 fs4 ls8 v5">\u22121</span></span></div><div class="t m0 x1b ha y9e ff8 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="c x2 y9c w6 hf"><div class="t m0 x1c ha y9d ff8 fs0 fc0 sc0 ls1 ws0">Volume / mL </div><div class="t m0 x1d ha y9e ff8 fs0 fc0 sc0 ls1 ws0">NaOH 0,5 mol L<span class="ff9 fs4 ls8 v5">\u22121</span></div><div class="t m0 x1e ha y9e ff8 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="c x1f y9c w7 hf"><div class="t m0 x20 ha y9d ff8 fs0 fc0 sc0 ls1 ws0">A<span class="_0 blank"></span>ltura / cm<span class="_8 blank"> </span> </div><div class="t m0 x21 ha y9e ff8 fs0 fc0 sc0 ls1 ws0">do precipitado </div></div><div class="c x17 y9f w4 h10"><div class="t m0 x22 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">1 </div></div><div class="c x18 y9f w5 h10"><div class="t m0 x19 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">1,0 ± 0,05 mL </div></div><div class="c x2 y9f w6 h10"><div class="t m0 x23 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">11,00 ± 0,05 mL </div></div><div class="c x1f y9f w7 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">1,50 ± 0,05 <span class="lse wsa">cm<span class="_8 blank"> </span></span> </div></div><div class="c x17 ya1 w4 h10"><div class="t m0 x22 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">2 </div></div><div class="c x18 ya1 w5 h10"><div class="t m0 x24 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">2,00 ± 0,05 mL </div></div><div class="c x2 ya1 w6 h10"><div class="t m0 x23 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">10,00 ± 0,05 mL </div></div><div class="c x1f ya1 w7 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">3,00 ± 0,05 cm </div></div><div class="c x17 ya2 w4 h10"><div class="t m0 x22 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">3 </div></div><div class="c x18 ya2 w5 h10"><div class="t m0 x24 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">4,00 ± 0,05 mL </div></div><div class="c x2 ya2 w6 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">8,00 ± 0,05 mL </div></div><div class="c x1f ya2 w7 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">4,00 ± 0,05 cm </div></div><div class="c x17 ya3 w4 h10"><div class="t m0 x22 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">4 </div></div><div class="c x18 ya3 w5 h10"><div class="t m0 x24 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">6,00 ± 0,05 mL </div></div><div class="c x2 ya3 w6 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">6,00 ± 0,05 mL </div></div><div class="c x1f ya3 w7 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">2,00 ± 0,05 cm </div></div><div class="c x17 ya4 w4 h11"><div class="t m0 x22 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">5 </div></div><div class="c x18 ya4 w5 h11"><div class="t m0 x24 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">8,00 ± 0,05 mL </div></div><div class="c x2 ya4 w6 h11"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">4,00 ± 0,05 mL </div></div><div class="c x1f ya4 w7 h11"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">1,50 ± 0,05 cm </div></div><div class="c x17 ya5 w4 h10"><div class="t m0 x22 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">6 </div></div><div class="c x18 ya5 w5 h10"><div class="t m0 x21 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">10,00 ± 0,05 mL </div></div><div class="c x2 ya5 w6 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">2,00 ± 0,05 mL </div></div><div class="c x1f ya5 w7 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0,50 ± 0,05 cm </div></div><div class="t m0 x4 ha ya6 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 ha ya7 ff8 fs0 fc0 sc0 ls1 ws0">Tabela 2: Quantidade de matéria dos reagentes e produtos antes e depois da </div><div class="t m0 x4 ha ya8 ff8 fs0 fc0 sc0 ls1 ws0">reação. </div><div class="t m0 x4 ha ya9 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="c x16 yaa w8 h10"><div class="t m0 x14 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="c x11 yaa w9 h10"><div class="t m0 x14 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="c x3 yaa wa h10"><div class="t m0 x26 ha ya0 ff8 fs0 fc0 sc0 ls1 ws2">CuSO<span class="fs4 ws0">4 / <span class="fs0">mol </span></span></div></div><div class="c x27 yaa wb h10"><div class="t m0 x25 ha ya0 ff8 fs0 fc0 sc0 ls1 ws0">NaOH /mol </div></div><div class="c x28 yaa wa h10"><div class="t m0 x1a ha ya0 ff8 fs0 fc0 sc0 ls1 ws2">Cu(OH)<span class="fs4 lsd ws0">2 </span><span class="ws0">/mol </span></div></div><div class="c x29 yaa wc h10"><div class="t m0 x1a ha ya0 ff8 fs0 fc0 sc0 lsf wsb">Na<span class="fs4 ls1 ws5">2</span><span class="lsb ws8">SO<span class="fs4 lsd ws0">4 <span class="fs0 ls1">/ mol </span></span></span></div></div><div class="c x16 yab w8 h12"><div class="t m0 x25 ha yac ff8 fs0 fc0 sc0 ls1 ws0">TUBO 1 </div></div><div class="c x11 yad w9 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Antes </div></div><div class="c x3 yad wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">0,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yad wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">5,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yad wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x29 yad wc h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x11 yab w9 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Depois </div></div><div class="c x3 yab wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x27 yab wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">4,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yab wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">0,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x29 yab wc h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">0,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x16 yae w8 h12"><div class="t m0 x25 ha yac ff8 fs0 fc0 sc0 ls1 ws0">TUBO 2 </div></div><div class="c x11 yaf w9 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Antes </div></div><div class="c x3 yaf wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yaf wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">5,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yaf wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x29 yaf wc h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x11 yae w9 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Depois </div></div><div class="c x3 yae wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x27 yae wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">3,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yae wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x29 yae wc h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x16 yb0 w8 h13"><div class="t m0 x25 ha yb1 ff8 fs0 fc0 sc0 ls1 ws0">TUBO 3 </div></div><div class="c x11 yb2 w9 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Antes </div></div><div class="c x3 yb2 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">2,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yb2 wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">4,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yb2 wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x29 yb2 wc h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x11 yb0 w9 h11"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Depois </div></div><div class="c x3 yb0 wa h11"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x27 yb0 wb h11"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x28 yb0 wa h11"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">2,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x29 yb0 wc h11"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">2,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x16 yb3 w8 h12"><div class="t m0 x25 ha yac ff8 fs0 fc0 sc0 ls1 ws0">TUBO 4 </div></div><div class="c x11 yb4 w9 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Antes </div></div><div class="c x3 yb4 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">3,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yb4 wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">3,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yb4 wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x29 yb4 wc h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x11 yb3 w9 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Depois </div></div><div class="c x3 yb3 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yb3 wb h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x28 yb3 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x29 yb3 wc h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x16 yb5 w8 h12"><div class="t m0 x25 ha yac ff8 fs0 fc0 sc0 ls1 ws0">TUBO 5 </div></div><div class="c x11 yb6 w9 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Antes </div></div><div class="c x3 yb6 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">4,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yb6 wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">2,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yb6 wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x29 yb6 wc h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x11 yb5 w9 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Depois </div></div><div class="c x3 yb5 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">3,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yb5 wb h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x28 yb5 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x29 yb5 wc h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x16 y18 w8 h12"><div class="t m0 x25 ha yac ff8 fs0 fc0 sc0 ls1 ws0">TUBO 6 </div></div><div class="c x11 yb7 w9 h10"><div class="t m0 x1c h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Antes </div></div><div class="c x3 yb7 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">5,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 yb7 wb h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">1,0x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x28 yb7 wa h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x29 yb7 wc h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x11 y18 w9 h10"><div class="t m0 x25 h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">Depois </div></div><div class="c x3 y18 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">4,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x27 y18 wb h10"><div class="t m0 x2a h7 ya0 ff4 fs0 fc0 sc0 ls1 ws0">0 </div></div><div class="c x28 y18 wa h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">0,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="c x29 y18 wc h10"><div class="t m0 x19 h8 ya0 ff4 fs0 fc0 sc0 ls1 ws2">0,5x10<span class="fs4 ws5 v5">-3</span><span class="ws0"> </span></div></div><div class="t m0 x4 ha yb8 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 yb9 ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span>Para calcular a quantidade de matéria, utilizamos a fórmula: </div><div class="t m0 x2 ha yba ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x2b ha ybb ff8 fs0 fc0 sc0 ls1 ws0">n = c x V </div><div class="t m0 x2 ha ybc ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 ybd ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span>Sendo que: </div><div class="t m0 x4 ha ybe ff8 fs0 fc0 sc0 lsc ws0">n <span class="ff4 ls1">= quantidade de matéria;<span class="ff8"> </span></span></div><div class="t m0 x4 h8 ybf ff8 fs0 fc0 sc0 ls0 ws0">c <span class="ff4 ls1">= concentração da solução (mol mL<span class="fs4 ws5 v5">-1</span><span class="ls10 wsc">);</span><span class="ff8"> </span></span></div><div class="t m0 x4 ha yc0 ff8 fs0 fc0 sc0 lsb ws0">V <span class="ff4 ls1">= mL. </span></div><div class="t m0 x4 ha yc1 ff8 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 yc2 ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span>Com base no cálculo de quantidade de matéria, foi possív<span class="_0 blank"></span>el encontrar a </div><div class="t m0 x4 h7 yc3 ff4 fs0 fc0 sc0 ls1 ws0">quantidade de matéria de cada reagente em cada parte do ex<span class="_0 blank"></span>perimento. Após obter a </div><div class="t m0 x4 h7 yc4 ff4 fs0 fc0 sc0 ls1 ws0">quantidade dos reagentes, calculou-se a quantidade de matéria dos produtos tendo </div><div class="t m0 x4 h7 yc5 ff4 fs0 fc0 sc0 ls1 ws0">como base a equação balanceada. Sendo assim a altura do precipitado é proporcional </div><div class="t m0 x4 h7 yc6 ff4 fs0 fc0 sc0 ls1 ws0">a massa do hidróxido de cobre. </div><div class="t m0 x4 ha yc7 ff8 fs0 fc0 sc0 ls1 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div> <div id="pf7" class="pf w0 h0" data-page-no="7"><div class="pc pc7 w0 h0"><div class="t m0 x10 h5 y29 ff4 fs3 fc0 sc0 ls1 ws0">5 </div><div class="t m0 x4 h5 y2a ff5 fs3 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 ha y56 ff8 fs0 fc0 sc0 ls1 ws0">Com base na tabela 2: </div><div class="t m0 x4 h7 y98 ff4 fs0 fc0 sc0 ls0 wsd">a)<span class="ls1 ws0"> <span class="_b blank"> </span>Excesso de NaOH: tubos 1 e 2. </span></div><div class="t m0 x15 h7 y99 ff4 fs0 fc0 sc0 ls1 ws0">Excesso de CuSO<span class="fs4 ws5">4</span>: tubos 4, 5 e 6. </div><div class="t m0 x15 h7 y9a ff4 fs0 fc0 sc0 ls1 ws0">Tubo 3: não houve de excesso de reagentes. </div><div class="t m0 x4 h7 y9b ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 yc8 ff4 fs0 fc0 sc0 ls0 wsd">b)<span class="ls1 ws0"> <span class="_b blank"> </span>É <span class="_3 blank"> </span>possível <span class="_2 blank"> </span>d<span class="_8 blank"> </span>emonstrar <span class="_3 blank"> </span>experimentalmente <span class="_2 blank"> </span>o <span class="_3 blank"> </span>que <span class="_3 blank"> </span>foi <span class="_3 blank"> </span>afirmado <span class="_3 blank"> </span>no <span class="_3 blank"> </span>item <span class="_2 blank"> </span>an<span class="_8 blank"> </span>terior, <span class="_2 blank"> </span>p<span class="_8 blank"> </span>or </span></div><div class="t m0 x15 h7 yc9 ff4 fs0 fc0 sc0 ls1 ws0">conta <span class="_3 blank"> </span>da<span class="_8 blank"> </span> <span class="_3 blank"> </span>rea<span class="_8 blank"> </span>ção <span class="_3 blank"> </span>do <span class="_4 blank"> </span>tubo <span class="_f blank"> </span>3, <span class="_3 blank"> </span>onde <span class="_4 blank"> </span>havia <span class="_4 blank"> </span>uma <span class="_4 blank"> </span>quantidade <span class="_3 blank"> </span>de <span class="_4 blank"> </span>cada <span class="_4 blank"> </span>reagente <span class="_3 blank"> </span>e <span class="_4 blank"> </span>eles </div><div class="t m0 x15 h7 yca ff6 fs0 fc0 sc0 ls1 ws0">foram <span class="_10 blank"> </span>consumidos <span class="_10 blank"> </span>\u201ccompletamente\u201d.<span class="ff4"> </span></div><div class="t m0 x15 h7 ycb ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 ycc ff4 fs0 fc0 sc0 ls1 ws0">c) <span class="_11 blank"> </span>Um <span class="_4 blank"> </span>d<span class="_8 blank"> </span>os <span class="_4 blank"> </span>possíveis <span class="_4 blank"> </span>erro<span class="_8 blank"> </span>s <span class="_4 blank"> </span>do <span class="_f blank"> </span>experimento <span class="_4 blank"> </span>é <span class="_4 blank"> </span>a <span class="_f blank"> </span>precisão, <span class="_4 blank"> </span>pois <span class="_f blank"> </span>não <span class="_4 blank"> </span>há<span class="_7 blank"> </span> <span class="_4 blank"> </span>como <span class="_f blank"> </span>garantir </div><div class="t m0 x15 h7 ycd ff4 fs0 fc0 sc0 ls1 ws0">medidas <span class="_b blank"> </span>exatas <span class="_b blank"> </span>para <span class="_b blank"> </span>a <span class="_b blank"> </span>reação <span class="_b blank"> </span>utilizando <span class="_b blank"> </span>a <span class="_b blank"> </span>pipe<span class="_8 blank"> </span>ta <span class="_b blank"> </span>graduada, <span class="_b blank"> </span>pois <span class="_b blank"> </span>há <span class="_b blank"> </span>um <span class="_b blank"> </span>erro </div><div class="t m0 x15 h7 yce ff4 fs0 fc0 sc0 ls1 ws0">proveniente <span class="_7 blank"> </span>da <span class="_7 blank"> </span>pipeta, <span class="_7 blank"> </span>outro <span class="_7 blank"> </span>fato, <span class="_7 blank"> </span>é <span class="_7 blank"> </span>a <span class="_9 blank"> </span>pe<span class="_8 blank"> </span>ra<span class="ffa ls11"> </span>utilizada <span class="_7 blank"> </span>com <span class="_7 blank"> </span>a <span class="_7 blank"> </span>pipeta, <span class="_7 blank"> </span>pois <span class="_7 blank"> </span>nem <span class="_7 blank"> </span>sempre </div><div class="t m0 x15 h7 ycf ff4 fs0 fc0 sc0 ls1 ws0">permite <span class="_2 blank"> </span>so<span class="_8 blank"> </span>ltar <span class="_2 blank"> </span>toda <span class="_2 blank"> </span>a<span class="_8 blank"> </span> <span class="_2 blank"> </span>quantidade <span class="_3 blank"> </span>do <span class="_2 blank"> </span>reagente <span class="_3 blank"> </span>no <span class="_2 blank"> </span>tubo, <span class="_2 blank"> </span>o <span class="_3 blank"> </span>que <span class="_2 blank"> </span>pode <span class="_3 blank"> </span>comprometer <span class="_2 blank"> </span>a </div><div class="t m0 x15 h7 yd0 ff4 fs0 fc0 sc0 ls1 ws0">reação. <span class="_9 blank"> </span>Para <span class="_9 blank"> </span>melho<span class="_8 blank"> </span>rar, <span class="_9 blank"> </span>seria <span class="_9 blank"> </span>necessário <span class="_9 blank"> </span>utilizar <span class="_9 blank"> </span>instrumen<span class="_8 blank"> </span>tos <span class="_7 blank"> </span>d<span class="_8 blank"> </span>e <span class="_9 blank"> </span>medição <span class="_9 blank"> </span>com <span class="_2 blank"> </span>uma </div><div class="t m0 x15 h7 yd1 ff4 fs0 fc0 sc0 ls1 ws0">precisão maior. </div><div class="t m0 x15 h7 yd2 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 yd3 ff4 fs0 fc0 sc0 ls0 wsd">d)<span class="ls1 ws0"> <span class="_b blank"> </span>O <span class="_3 blank"> </span>peso <span class="_2 blank"> </span>do <span class="_3 blank"> </span>produto, <span class="_2 blank"> </span>entretanto, <span class="_3 blank"> </span>no <span class="_3 blank"> </span>experimento <span class="_2 blank"> </span>realizado <span class="_3 blank"> </span>não <span class="_2 blank"> </span>foi <span class="_2 blank"> </span>po<span class="_8 blank"> </span>ssível <span class="_2 blank"> </span>obter <span class="_3 blank"> </span>tal </span></div><div class="t m0 x15 h7 yd4 ff4 fs0 fc0 sc0 ls1 ws0">medida, pois não houve separação das fases<span class="_0 blank"></span> fo<span class="_8 blank"> </span>rmadas. </div><div class="t m0 x11 h7 yd5 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 ha yd6 ff4 fs0 fc0 sc0 ls0 wsd">e)<span class="ls12 ws0"> <span class="ff8 ls9"> </span><span class="ls1">A <span class="_12 blank"> </span>estequiometria <span class="_12 blank"> </span>determinada <span class="_12 blank"> </span>experimentalmente <span class="_12 blank"> </span>está <span class="_12 blank"> </span>de <span class="_12 blank"> </span>acordo<span class="_7 blank"> </span> <span class="_12 blank"> </span>com <span class="_12 blank"> </span>a </span></span></div><div class="t m0 x15 h7 yd7 ff4 fs0 fc0 sc0 ls1 ws0">estequiometria <span class="_13 blank"> </span>encontrada <span class="_13 blank"> </span>na <span class="_13 blank"> </span>tabela <span class="_13 blank"> </span>por<span class="_0 blank"></span>que <span class="_13 blank"> </span>as <span class="_13 blank"> </span>quantidades <span class="_14 blank"> </span>do <span class="_13 blank"> </span>precipitado<span class="_8 blank"> </span> </div><div class="t m0 x15 h7 yd8 ff4 fs0 fc0 sc0 ls1 ws0">encontradas estão de acordo com as esperadas da proporção. </div><div class="t m0 x4 h6 yd9 ff4 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 yda ff4 fs2 fc0 sc0 ls1 ws3">Conclusão<span class="fs0 ws0"> </span></div><div class="t m0 x4 h7 y41 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y42 ff4 fs0 fc0 sc0 ls1 ws0"> <span class="_c blank"> </span>Tendo em mente o que foi feito na ex<span class="_0 blank"></span>periência, é possível evidenciar, o Princípio </div><div class="t m0 x4 h7 y43 ff4 fs0 fc0 sc0 ls1 ws0">de Conservação de Massas, no qual a quant<span class="_0 blank"></span>idade dos produtos depende diretamente </div><div class="t m0 x4 h7 y44 ff4 fs0 fc0 sc0 ls1 ws0">da quantidade dos reagentes. A formação de diferentes quantidades de hidróxido de </div><div class="t m0 x4 h7 y45 ff4 fs0 fc0 sc0 ls1 ws0">chumbo se dá por conta das diferentes quantidades dos reagentes. Sendo assim, a </div><div class="t m0 x4 h7 y46 ff4 fs0 fc0 sc0 ls1 ws0">massa em uma reação química se conserva e a reação ocorre entre os elementos </div><div class="t m0 x4 h7 y47 ff4 fs0 fc0 sc0 ls1 ws0">químicos até que um dos reagentes (o limitante) acabe. </div><div class="t m0 x4 h7 y48 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 y49 ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h6 ydb ff4 fs2 fc0 sc0 ls1 ws0">Referências </div><div class="t m0 x4 h6 ydc ff4 fs2 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h7 ydd ff4 fs0 fc0 sc0 ls1 ws0">[1] Departamento de Química, UFMG - Apostila de Química Geral, 2006. </div><div class="t m0 x4 h7 yde ff4 fs0 fc0 sc0 ls1 ws0"> </div><div class="t m0 x4 h5 ydf ff4 fs3 fc0 sc0 ls1 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.000000,0.000000,0.000000,1.000000,0.000000,0.000000]}'></div></div>
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