Consider the Reaction
Cu²⁺(aq) + 4 NH₃(aq) $\leftrightharpoons$ Cu(NH₃)₄²⁺(aq)
K_f = 2

Consider the reaction
Cu²⁺(aq) + 4 NH₃(aq) $\leftrightharpoons$ Cu(NH₃) ₄²⁺(aq)
K_f = 2.1 × 10¹³
If the K_sp for Cu(OH) ₂ is 2.2 × 10^-20, what is the value of the equilibrium constant, K, for the reaction below?
Cu(NH₃) ₄²⁺(aq) + 2 OH^-(aq) $\leftrightharpoons$ Cu(OH) ₂(s) + 4 NH₃(aq)

A) 1.0 × 10^-33
B) 4.6 × 10^-7
C) 2.1 × 10¹³
D) 2.2 × 10⁶
E) 9.5 × 10³²