Question

For the reaction, $3B{r}_2+6O{H}^{\ominus }\to 5B{r}^{\ominus }+Br{O}_3^{\ominus }+3H_{2}O$
Equivalent weight of $B{r}_2$(molecular weight $M$) is:

• A. $\frac{M}{2}$
• B. $\frac{M}{10}$
• C. $(\frac{M}{2}+\frac{M}{10})$
• D. $\left(\frac{M}{6}\right)$

Answer 1

The correct option is C $(\frac{M}{2}+\frac{M}{10})$

$3B{r}_2+O{H}^{-}\to 5B{r}^{-}+Br{O}_3^{-}+3H_{2}O$

Equivalent wt. of $B{r}_2$ (mol et. m)

$B{r}_2^0\to B{o}^{-}$

$\Delta r=2$

$B{r}_2^0\to Br{O}_3^{-}$

$\Delta r=5\times 2=10$

$E=\frac{M}{2}+\frac{M}{10}$