Question

3. Which of the following will be more soluble in acidic conditions compared to neutral conditions? Mark all that apply, and show the equilibrium reaction that explains why NaC2H,02 NH4I CaCO3 KBr

Answer 1

The substances that will be more soluble in acidic conditions, are those that are composed of anion coming from a weak acid, that when reacting with the ions of H + in the acid solution, produce their constituent acid, these are:

1) C2H3O2- + H + = HC2H3O2

2) CO3-2 + 2 H + = H2CO3

In the case of NH4I, it dissociates into the NH4 + ion that comes from a weak substance, but it is not an anion.

In the case of KBr, it dissociates in the anion Br-, but does not form a weak acid, but a strong one (HBr).

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