. Which of the following would be more soluble if the pH of the solution was decreased?
A. AgNO3
B. AgCl
C. PbBr2
D. MgCO3
E. pH would have no effect on all of the above.
Please explain how you answer this question.
Answer : D) MgCO3
Explanation :
MgCO3 (s) -------------> Mg2+ (aq) + CO32- (aq)
if H+ is added , then CO32- reacts with H+ to form H2CO3. so CO32- concentration decreases .so reaction shift to right side. so solubility increases.
H+ (aq) + CO32- (aq) -----------> H2CO3 (aq).
remaining all AgNO3 , AgCl and PbBr2 are coming from strong acids. so these are not react with H+
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