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Question
Solid KCN is added to a solution composed of 0.10 M Ag+and 0.10 M Zn2+just until a precipitate forms. What is the composition of this initial precipitate? AgCN Ksp= 2.2 x10-16and Zn(CN)2Ksp= 3 x10-16.A) The precipitate is pure AgCN(s).
B) The precipitateis pure Zn(CN)2(s).
C) The precipitate is a mixture of AgCN(s) and Zn(CN)2(s).
D) The precipitate is a mixture of KCN(s) and AgCN(s).
E) The precipitate is a mixture of KCN(s) and Zn(CN)2(s).
Answer
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