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Ion Electron Method

Balance the f...

Question

Balance the following equation.
$A g + K C N + O_{2} + H_{2} O \to K A g (C N)_{2} + K O H$

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Solution

$[A g + 2 C N^{-} \to [A g (C N)_{2}]^{-} + e] \times 4$
$O_{2} + 2 H_{2} O + 4 e \to 4 O H^{-}$ .
$4 A g + 8 K C N + O_{2} + 2 H_{2} O \to 4 K A g (C N)_{2} + 4 K O H$ .

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