Question

Find the volume strength of $H_2{O}_2$ solution prepared by mixing $250\text{mL}$ of $3N{H}_2{O}_2$ and $750\text{mL}$ of $1N{H}_2{O}_2$ solution:

• A. $1.5\text{V}$
• B. $8.4\text{V}$
• C. $5.6\text{V}$
• D. $11.2\text{V}$

Answer 1

The correct option is B $8.4\text{V}$

Normality of final solution,
$N_f=\frac{N_1{V}_1+N_2{V}_2}{V_1+V_2}=\frac{3\times 250+1\times 750}{1000}=1.5\text{N}$
So, volume strength
$=N_f\times 5.6$
$=1.5\times 5.6$
$=8.4\text{V}$