What Is the Minimum Mass of Na₂CO₃ (Molar Mass =

question 75

Multiple Choice

What is the minimum mass of Na₂CO₃ (molar mass = 105.990 g/mol) that must be added to 43.4 mL of a 1.0 × 10^-4 M AgNO₃ solution in order for precipitation to occur? The K_sp of Ag₂CO₃ is 8.6 × 10^-12.Assume no volume change occurs upon addition of Na₂CO₃.

• A) 4.6 × 10^-4 g
• B) 3.1 × 10^-4 g
• C) 2.3 × 10^-4 g
• D) 4.0 × 10^-7 g
• E) 4.0 × 10^-3 g

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