Posted by Jim on Tuesday, May 4, 2010 at 8:59pm.
Ag2CO3 --> 2Ag^+ + CO3^-2
What will HCl do. It reacts with CO3^- (remember the reaction with acid to produce CO2 and H2O), so reaction shifts to the right and solubility is increased.
b. Add AgNO3. That is a common ion, Ag^+ is increased so reaction shifts to the left. Solubility decreased.
c. Add NaCN. CN^- reacts with Ag^+ to produce Ag(CN)2^-. That removes Ag^+ from soln, reaction shifts to right. Solubility increases.
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