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EquilibriumMCQ

Ag+(aq) + NH3(aq) ⇄ Ag(NH3)+(aq) Keq1 = 2.0 × 10³ Ag(NH3)+(aq) + NH3(aq) ⇄ Ag(NH3)2+(aq) Keq2 = 8.0 Equilibrium Chemistry Question

Question

Ag+(aq) + NH3(aq) ⇄ Ag(NH3)+(aq) Keq1 = 2.0 × 10³
Ag(NH3)+(aq) + NH3(aq) ⇄ Ag(NH3)2+(aq) Keq2 = 8.0 × 10³

Equal volumes of 0.1 M AgNO3(aq) and 2.0 M NH3(aq) are mixed and the reactions represented above occur. Which Ag species will have the highest concentration in the equilibrium system shown below, and why?

Ag+(aq) + 2 NH3(aq) ⇄ Ag(NH3)2+(aq) Keq3 = ?

A.

Ag+(aq), because Keq3 = 4

B.

Ag+(aq), because Keq1 < Keq2

C.

Ag(NH3)2+(aq), because Keq3 = 1.6 × 10⁷

✓ Correct
D.

Ag(NH3)2+(aq), because Keq1 < Keq2

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