What is the pH of a solution before the equivalence point in the titration of a weak acid with a strong base? a) The pH is determined by the concen...
What is the pH of a solution before the equivalence point in the titration of a weak acid with a strong base?
a) The pH is determined by the concentration and dissociation constant of the acid.
b) The pH is calculated based on the concentration of the salt formed and the dissociation constant of the acid.
c) The pH is equal to 7.00.
d) The pH is determined by the concentration and dissociation constant of the base.
a) The pH is determined by the concentration and dissociation constant of the acid.
b) The pH is calculated based on the concentration of the salt formed and the dissociation constant of the acid.
c) The pH is equal to 7.00.
d) The pH is determined by the concentration and dissociation constant of the base.
a) The pH is determined by the concentration and dissociation constant of the acid.
b) The pH is calculated based on the concentration of the salt formed and the dissociation constant of the acid.
c) The pH is equal to 7.00.
d) The pH is determined by the concentration and dissociation constant of the base.
a) The pH is determined by the concentration and dissociation constant of the acid.
b) The pH is calculated based on the concentration of the salt formed and the dissociation constant of the acid.
c) The pH is equal to 7.00.
d) The pH is determined by the concentration and dissociation constant of the base.
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A alternativa correta é a letra A) O pH é determinado pela concentração e constante de dissociação do ácido. Antes do ponto de equivalência, a solução contém um excesso de ácido fraco e um pouco de sal. A adição de uma base forte neutraliza o ácido fraco, formando o sal e água. A concentração do ácido fraco diminui, enquanto a concentração do sal aumenta. O pH da solução é determinado pela concentração do ácido fraco e sua constante de dissociação.
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