Predicting the Effect on Solubility of Adding Strong Acid
Solutions:
(a) Fe(CN)2 (s) Fe2+(aq) + 2 CN-(a) Increases solubility:
CN- ion is a weak base. It reacts with water to form the weak acid HCN, so it would be removed from the solubility expression.
(b) KBr(s) K+(aq) + Br -(aq) No effect:
Br- is the anion of a strong acid, and K+ is the cation of a strong base.
(c) Al(OH)3 (s) Al3+(aq) + 3 OH-(aq) Increases solubility: OH- reacts with the added acid to produce water in a simple acid-base reaction.
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