Which of the following will be more soluble in an acidic solution than in pure water?
Ag2S, KClO4, CaCO3, AgCl, Ni(OH)2
Answer: Ag2S, CaCO3 and Ni(OH)2
the salts that will be more soluble in an acidic solution than in pure water will be those that contain basic anions.
S2-, CO32- and OH- ions are basic anions, gives strong base OH- in aqueous solutions as shown below.
S2-(aq) + H2O(l) <==> HS-(aq) + OH-(aq)
OH-(aq) + H2O(l) <==> H2O(l) + OH-(aq)
CO32-(aq) + H2O(l) <==> HCO3-(aq) + OH-(aq)
ClO4- and Cl- are weak conjugate bases of strong acids HClO4 and HCl respectively.
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