Question

What would be the K value for the overall equilibrium expression given the contributing expressions: CuCO3...

What would be the K value for the overall equilibrium expression given the contributing expressions:

CuCO3 (s) ↔ Cu2+ (aq) + CO32- (aq) Ksp = 2.5×10-10

Cu(NH3)42+ (aq) ↔ Cu2+ (aq) + 4NH3 (aq)  K = 2.0×10-13

Overall expression:

CuCO3 (s) + 4NH3 (aq) ↔ Cu(NH3)42+ (aq) + CO32- (aq)   K = ?

2.502×10-10

1.25×103

5.0×10-23

8.0×10-4

1.4×10-8

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