What is the oxidation number of tungsten in the ion $W_{6} O_{6} C l_{12}^{2 -}$ ?

2.7

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3.3

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3.7

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4.3

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Solution

The correct option is B 3.7
$W_{6} O_{6} C l_{12}^{2 -}$

$6 \times (x) + (- 2) \times 6 + 12 (- 1) = - 2$

$6 x - 12 - 12 = - 2$

$6 x - 24 = - 2$

$6 x = 24 - 2$

$6 x = 22$

$x = \frac{22}{6}$ = $3.666$

$x = 3.67$

$x = 3.7$

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