Question

In acidic medium potassium dichromate acts as an oxidant according to the equation,

$Cr_{2}O_{7}^{2 -} + 14H^{+} + 6e^{-} \rightarrow 2Cr^{3 +} + 7H_{2}O$.

What is the equivalent weight of$K_{2}Cr_{2}O_{7}$?

(mol. Wt. = M)

• A. $M$
• B. $M/2$
• C. $M/3$
• D. $M/6$

Answer 1

Answer: (D)

$M/6$

Answer 2

Since it accept $6e^{-}$ its

Equivalent weight = $\frac{M}{6}$.