Question

Find the volume strength of $H_2{O}_2$ solution prepared by mixing of $250$ mL of $3N{H}_2{O}_2$ & 750 mL of 1N $H_2{O}_2$ solution.

• A. $1.5$ V
• B. $8.4$ V
• C. $5.6$ V
• D. $11.2$ V

Answer 1

The correct option is B $8.4$ V

$N_1{V}_1+N_2{V}_2=N_f(V_1+V_2)$

$(250mL\times 3N)+(750mL\times 1N)=N_f(750+250)$

$\frac{750+750}{1000}=N_f$

$N_f=1.5N$

Volume strength of $H_2{O}_2=5.6\times Normality$

$=5.6\times 1.5=8.4V$