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VBT Tetrahedral vs Square Planar

When KNO 2 ...

Question

When ${K N O}_{2}$ and ${C H}_{3} C O O H$ is added to ${C o C l}_{2}$ solution, yellow ppt. of $K_{4} [{C o ({N O}_{2})}_{6}]$ is formed.

If the given statement is true enter 1 else enter 0.

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Solution

The given statement is not true as precipitate of $K_{3} [{C o ({N O}_{2})}_{6}]$ is formed and not $K_{4} [{C o ({N O}_{2})}_{6}]$ .
$C o^{2 +} + 7 N O_{2}^{-} + 2 H^{+} + 3 K^{+} \to K_{3} [{C o ({N O}_{2})}_{6}] ↓ + N O ↑ + H_{2} O$

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