Silver Nitrate (AgNO₃)is Slowly Added to a Solution Containing 0

question 73

Multiple Choice

Silver nitrate (AgNO₃) is slowly added to a solution containing 0.100 M Br− and 0.050 M FeCN₆⁴⁻ until a precipitate just forms.What is the molar concentration of Ag⁺ just as the precipitate forms? AgBr K_sp = 5.0 × 10^-13 and Ag₄FeCN₆ K_sp = 8.5 × 10^-45.

• A)2.0 × 10^-11 M Ag⁺
• B)5.0 × 10^-12 M Ag⁺
• C)1.0 × 10^-11 M Ag⁺
• D)3.3 × 10^-12 M Ag⁺
• E)1.7 × 10^-43 M Ag⁺

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