A Solution Contains 2

Multiple Choice

A solution contains 2.2 × 10^-3 M in Cu²⁺ and 0.33 M in LiCN.If the K_f for Cu(CN) ₄^2- is 1.0 × 10²⁵,how much copper ion remains at equilibrium?

A) 3.8 × 10^-24 M
B) 1.9 × 10^-26 M
C) 6.7 × 10^-28 M
D) 2.9 × 10^-27 M
E) 4.6 × 10^-25 M