Why does silver carbonate dissolve in nitric acid?

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Silver carbonate dissolves in nitric acid due to LeChatelier's principle, which states that a system at equilibrium will adjust to counteract changes. When nitric acid is added, it reacts with silver carbonate to form silver nitrate, which is soluble, and carbonic acid. Carbonic acid, however, is unstable and decomposes into carbon dioxide and water. This removal of carbonic acid shifts the equilibrium to favor the dissolution of silver carbonate, thus explaining the solubility increase in the presence of nitric acid. The final step of carbonic acid decomposition is crucial for understanding the complete process in relation to LeChatelier's principle.
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This is my last question on a prefab and I want to make sure this answer is correct. The question states;
On the basis of LeChatelier's principal, explain why silver carbonate dissolves when nitric acid is added.
I said it was because mixing nitric acid and silver carbonate will produce silver nitrate, which is soluble, and carbonic acid, (I'm assuming carbon dioxide and water which forms carbonic acid). This answer seems much more like the explanation of just a chemical reaction instead of relating directly to LeChatelier's principal. What am I missing? Thanks.
 
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You ignored the (most important) final step. What happens to carbonic acid?
 
Thanks.
 
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