Zn(II) Forms the Complex Ion [Zn(NH₃)₄]²⁺ Through Equilibrium Reactions in Which

Multiple Choice

Zn(II) forms the complex ion [Zn(NH₃) ₄]²⁺ through equilibrium reactions in which ammonia replaces coordinated water molecules in a stepwise manner. If log K₁ = 3.35, log K₂ = 2.74, log K₃ = 3.50, and log K₄ = 2.25, what is the overall K_f?

A) 3.6×10³⁰
B) 7.2×10²⁹
C) 2.4×10²⁹
D) 9.8×10²⁹
E) 7.4×10³⁰