Question

Calculate the normality of a solution containing 50 mL of 5 M solution $K_{2}C{r}_2{O}_7$ in acidic medium.

• A. 15 N
• B. 30 N
• C. 10 N
• D. None of the above

Answer 1

The correct option is B 30 N

Volume of solution =50 ml
Molarity of the solution = 5 M
In acidic medium,
$\stackrel{+6}{C}{r}_2{O}_7^{2-}\to \stackrel{+6}{C}{r}^{3+}$
$n_f=|3-6|\times 2=6|$
$\therefore \text{Normality=molarity}\times n_f$
$\Rightarrow \text{Normality}=5\times 6=30N$