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Types of Redox Reactions

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Question

What is the equivalent weight of potassium dichromate in acidic medium?

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Solution

${C r}_{2} O_{2}^{2 -} 6^{e -} - - \to {2 C r}^{3 +}$
Total number of electrons involved in this change is six.
$∴$ Equivalent\quad weight $= \frac{294}{6} = 49$ .

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