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Valency and Oxidation State

What is the o...

Question

What is the oxidation state of $C o$ in $[C o (H_{2} O)_{5} C l]^{2 +}$ ?

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Solution

The correct option is B $+ 3$
$[C o x {(H_{2} O)}_{5} 0 {C l]}^{2 +} - 1$

Let, $x$ be the oxidation state of Co.

Now,

$x + 5 \times 0 - 1 = 2; \Rightarrow x = + 3$

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