Question

Number of moles of $K_{2}C{r}_2{O}_7$ require to reduce one mole of $S{n}^{2+}$ ions is

• A. 1/3
• B. 3
• C. 1/6
• D. 6

Answer 1

The correct option is A 1/3

one mole of $S{n}^{2+}$ require 2 mole of electron to reduce and one mole of $K_{2}C{r}_2{O}_7$ give 6 mole of electron so one mole of $S{n}^{2+}$ require (1/3) mole of $K_{2}C{r}_2{O}_7$ for reduction.