Lechatelier's principle: buffers

Question

A state of dynamic equilibrium, Ag2CO3<=>2Ag CO3 2-, exists in solution.

a. What happens to the equilibrium if more Ag2CO3 is added to the system?

b. What happens to the equilibrium if AgNO3(aq) is added to the system?

c. What happens to the equilibrium if HCl(aq) is added to the system?

Answer 1

a) adding more Ag2CO3 which is the reactant will cause the system to shift to the right forming more products to use up the added reactants

b) adding Ag2NO3 which is a salt adds more Ag+ ions into the solution which is included in the products so the system will shift to the left forming more reactants to use up the added products

c) no change in the system at equilibrium will occur

Answer 2

a. Ag2CO3 is a reactant, so adding more of it will create more products, shifting the equilibrium to the right.

b. AgNO3 is a source of Ag, which is a product. Adding more of Ag will cause more reactants to be produced, shifting equilibrium to the left.

c. No change in equilibrium.