Question

How many moles of $K_{2}C{r}_2{O}_7$ can be reduced by 1 mole of $S{n}^{+2}$

• A. $\frac{1}{3}$
• B. $\frac{1}{6}$
• C. $\frac{2}{3}$
• D. 1

Answer 1

The correct option is A

$\frac{1}{3}$

It is clear from this equation that 3 moles of $s{n}^{2+}$ reduce one mole of $C{r}_2{O}_7^{2+}$, hence 1 mol. of $S{n}^{2+}$ will reduce $\frac{1}{3}$ moles of $C{r}_2{O}_7^{2-}$.