Qual é o número de oxidação do fósforo no anidrido fosforoso (P2O3)?
I - +2 II - +3 III - +4 IV - +5 a) Apenas I e II estão corretas. b) Apenas II e III estão corretas. c) Apenas I e III estão corretas. d) Apenas III e IV estão corretas. e) Todas as afirmativas estão corretas.
How are the inorganic chemistry functions grouped?
I - By their similar properties. II - By their molecular weight. III - By their color. IV - By their boiling point. a) Only I is correct. b) I and II are correct. c) I, II and IV are correct. d) Only III is correct.
What are the inorganic chemistry functions?
a) Hidretos, óxidos, hidróxidos, ácidos and sais. b) Hidretos, óxidos, hidróxidos, álcoois and sais. c) Hidretos, óxidos, hidróxidos, ácidos and bases. d) Hidretos, óxidos, hidróxidos, álcoois and bases.
What is the definition of Arrhenius for acids?
I - Acid is any substance that, when dissolved in water, releases hydrogen cation (H+). II - Acid is any substance that, when dissolved in water, releases hydroxide anion (OH-). III - Acid is any substance that, when dissolved in water, releases hydrogen peroxide (H2O2). IV - Acid is any substance that, when dissolved in water, releases oxygen (O2). a) Only I is correct. b) I and II are correct. c) I, III and IV are correct. d) Only II is correct.
How can we classify acids?
a) Hidrácidos and oxiácidos. b) Hidrácidos and perácidos. c) Oxiácidos and perácidos. d) Oxiácidos and peróxidos.
How to name acids?
I - According to the number of hydrogen cations (H+) present in the molecule. II - According to the number of oxygen atoms (O) present in the molecule. III - According to the anion present in the molecule. IV - According to the number of carbon atoms (C) present in the molecule. a) Only I and III are correct. b) I, II and IV are correct. c) Only III is correct. d) Only II is correct.
Write the correct formula for the following acidic oxides: SO2, SO3, P2O3, P2O5, N2O3, N2O5.
Write the formula for SO2. Write the formula for SO3. Write the formula for P2O3. Write the formula for P2O5. Write the formula for N2O3. Write the formula for N2O5.
What is the oxidation number of nitrogen in the compound NH3?
+1 -1 +2 -3
How are acids classified according to their molecular composition?
Hidrácidos: do not contain oxygen in the molecule. Oxiácidos: contain oxygen in the molecule. a) Only the first statement is correct. b) Only the second statement is correct. c) Both statements are correct. d) Both statements are incorrect.
Write the name of the acid followed by the name of the element and the suffix -idrico. For the oxyacids, there are several ways to name the acids. We will discuss two possibilities. What are they?
The first way is to know the name of the anion present in the acid and make a substitution in the ending of the anion name. The second possibility is to start from the acids whose names end in ico and, by adding or removing oxygen, we can arrive at the names of the other acids.
What is the definition of a base according to Arrhenius?
Bases are substances that dissolve in water and release the hydroxide anion (OH-).