Copper sulphate dissolves in excess of $\mathrm{KCN}$ to give:
Copper sulphate dissolves in excess of $\mathrm{KCN}$ to give:
- $\mathrm{Cu}(\mathrm{CN})_2$
- $\mathrm{CuCN}$
- $[\mathrm{Cu}(\mathrm{CN}) 4]^{3-}$
- $\left[\mathrm{Cu}(\mathrm{CN})_4\right]^{2-}$
Solution
$\mathrm{CuSO}_4+2 \mathrm{KCN} \rightarrow \mathrm{Cu}(\mathrm{CN})_2+\mathrm{K}_2 \mathrm{SO}_4$
Cupric cyanide
$\begin{array}{r}
2 \mathrm{Cu}(\mathrm{CN})_2 \rightarrow 2 \mathrm{Cu}(\mathrm{CN})+\mathrm{NC}-\mathrm{CN} \\
\text { Cyanogen } \\
\mathrm{Cu}(\mathrm{CN})+3 \mathrm{KCN} \rightarrow \mathrm{K}_3\left[\mathrm{Cu}(\mathrm{CN})_4\right]
\end{array}$
Soluble complex salt
Asked in: NEET 2006
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