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Q. In acidic medium potassium dichromate acts as an oxidant according to the equation,
$Cr_{2}O+14H^{+}+6e^{-}\to2Cr^{3+}+7H_{2}O$ What is the equivalent weight of $K_2Cr_2O_7?$ (mol. Wt. = M)

The d-and f-Block Elements

Solution:

Since it accept $6e^{-}$ its Equivalent weight $=\frac{M}{6}$