A 500-ML Sample of 2

question 67

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

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