A 500-ML Sample of 2

Multiple Choice

A 50.0-mL sample of 2.0  10^-4 M CuNO₃ is added to 50.0 mL of 4.0 M NaCN. Cu⁺ reacts with CN^- to form the complex ion Cu(CN) ₃^2-: Calculate the solubility of CuBr(s) (K_sp = 1.0  10^-5) in 1.0 L of 1.0 M NaCN.

A) 0.33 mol/L
B) 1.0  10^-6 mol/L
C) 1.0  10³ mol/L
D) 1.0 mol/L
E) none of these