What Is the Minimum Mass of Na₂CO₃ That Must Be

question 42

Multiple Choice

What is the minimum mass of Na₂CO₃ that must be added to 75.9 mL of a 9.0 × 10^-4 M AgNO₃ solution in order for precipitation to occur? For Ag₂CO₃,K_sp = 8.6 × 10^-12 .

• A)7.2 × 10^-3 g
• B)3.1 × 10^-4 g
• C)3.6 × 10^-3 g
• D)7.7 × 10^-8 g
• E)8.5 × 10^-5 g