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What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper

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asked Dec 25, 2017 in Chemistry by sforrest072 (157,439 points) ● 63 ● 448 ● 1291

What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is
obtained when H2S(g) is passed through this solution?

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answered Dec 25, 2017 by mdsamim (213,225 points) ● 5 ● 10 ● 23
selected Dec 25, 2017 by sforrest072
 
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very stable complex, which does not ionize to give Cu2+ ions when added to water. Hence, Cu2+ ions are not precipitated when H2S(g) is passed through the solution.

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