Question

A flask contains the following chemical system at equilibrium.
CuCO3(s) Cu2+(aq) + 2 CO32-(aq)
Addition of which of the following substances will increase the solubility of CuCO3(s) in water?
1/ aqueous hydrochloric acid
2/ aqueous sodium carbonate
3/ solid copper(II) carbonate
A.1 only
B.2 only
C.3 only
D.1 and 3
E.1, 2, and 3

Answer

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