Which is the best use of Le Châtelier\'s principle to explain why Ag 2 CO 3 diss
ID: 485922 • Letter: W
Question
Which is the best use of Le Châtelier's principle to explain why Ag2CO3 dissolves when HNO3 is added?
Ag2CO3 2Ag+ + CO32-
A.)Nitric acid binds with silver ions. The loss of silver ions causes the reaction to shift to the right.
B.) Nitric acid reacts with the carbonate ion to produce carbon dioxide and water. The loss of the insoluble gas causes silver(I) carbonate to dissolve.
Nitric acid doesn't have anything to do with the dissolving of silver(I) carbonate. It is coincidence that silver(I) carbonate dissolves more when nitric acid is added.
D.) Silver(I) carbonate doesn't like the nitric acid, and the reaction shifts right so it can get away from the nitric acid.
A.)Nitric acid binds with silver ions. The loss of silver ions causes the reaction to shift to the right.
B.) Nitric acid reacts with the carbonate ion to produce carbon dioxide and water. The loss of the insoluble gas causes silver(I) carbonate to dissolve.
C.)Nitric acid doesn't have anything to do with the dissolving of silver(I) carbonate. It is coincidence that silver(I) carbonate dissolves more when nitric acid is added.
D.) Silver(I) carbonate doesn't like the nitric acid, and the reaction shifts right so it can get away from the nitric acid.
Explanation / Answer
According to Lechateliers principle, decreasing the concentration of any of the product (by adding some external reagent) shifts the equilibrium to the right. When H+ ion (from HNO3) is added to Silvercarbonate, it reacts with the carbonate ion and form CO2 and H2O. As a result of which the carbonate ion concentration decreases and in order to replenish this loss the equilibrium shifts to right and hence solubility of silver carbonate increases.
Ans- B.) Nitric acid reacts with the carbonate ion to produce carbon dioxide and water. The loss of the insoluble gas causes silver(I) carbonate to dissolve.
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