MCQ
When $\text{KCN}$ is added to $\ce{CuSO_4}$ solution, there is formation of the stable water soluble complex. This complex is:
- A$\ce{K_4[Cu(CN)_6]}$
- ✓$\ce{K_3[Cu(CN)_4]}$
- C$\ce{K_2[Cu(CN)_4]}$
- D$\ce{K[Cu(CN)_3]}$
✓
Answer
Correct option: B.
$\ce{K_3[Cu(CN)_4]}$
When $\text{KCN}$ is added to $\ce{CuSO_4}$ solution, the following reaction occurs.
$\ce{4KCN+CuSO_4 \rightarrow K_3[Cu(CN)_4].}$
$\ce{4KCN+CuSO_4 \rightarrow K_3[Cu(CN)_4].}$
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