Which of the following salts (ionic compounds) will be substantially more soluble in an acidic solution than in pure water: Ag2CO3, AgClO4, PbI2, or Cd(OH)2?

1 Answer
anor277
Jan 2, 2016

We assume the addition of nitric acid, HNO_3 (because all nitrates are soluble).

Explanation:

Silver carbonate will be more soluble in nitric acid:

Ag_2CO_3(s) + 2HNO_3(aq) rarr 2AgNO_3(aq) + H_2O + CO_2uarr

Silver perchlorate is certainly soluble (and had hydrochloric been added, AgCl would precipitate):

AgClO_4(aq) + HCl(aq) rarr AgCl(s)darr + HClO_4(aq)

Plumbic iodide is pretty insoluble stuff, and addition of mineral acid would not bring it into solution, inasmuch as the anion I^- is not labile to acid hydrolysis as are OH^- or CO_3^(2-).

Cadmium hydroxide would dissolve with nitric acid.

Cd(OH)_2(s) + 2HNO_3(aq) rarr Cd(NO_3)_2(aq) + 2H_2O(l)

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