Chemistry question

Question

The compound more soluble in acidic solution than in just water.

AgCI

AgF

AgBr

AgOH

could you explain briefly which option is correct?

Answer 1

AgF and AgOH will more more soluble in acid that it will be in water.

Explanation: Le Chatelier's Principle.

If the salt is a result of a reaction with a weak acid, it will be more soluble in acid. Let us compare AgCl and AgF for example:

AgCl(s) <==> Ag+(aq) + Cl-(aq)

AgF(s) <==> Ag+(aq) + F-(aq)

If you add acid (H+), to the AgCl solution, that will combine with Cl- to make HCl which being a strong acid will immediately ionize back to H+ and Cl-, having no effect.

If you add acid H+) to the AgF solution, that will combine with F- to make HF which being a weak acid will not ionize back to H+ and F-, thus essentially acting to "remove" F- from solution. According to Le Chatelier's Principle, this will push the equilibrium to the right, making the AgF more soluble.