Chemistry 112

First, determine the chemical reactions

Solubility: ZnCO₃(s) → ← Zn²⁺(aq) + CO₃^2–(aq)

Complex Ion: Zn²⁺(aq) + 4 NH₃(aq) → ← [Zn(NH₃)₄]²⁺(aq)

Net: ZnCO₃(s) + 4 NH₃(aq) → ← [Zn(NH₃)₄]²⁺(aq) + CO₃^2–(aq)

K_c = [[Zn(NH₃)₄]²⁺]_e[CO₃^2–]_e [NH₃]_e⁴