Question

To neutralise 20 ml of $\frac{M}{10}$ sodium hydroxide, the volume of $\frac{M}{20}$ hydrochloric acid required is

• A. 10 ml
• B. 15 ml
• C. 20 ml
• D. 40 ml

Answer 1

The correct option is D 40 ml

NaOH HCl
$N_1{V}_1=N_2{V}_2;20\times \frac{1}{10}\times =\frac{1}{20}\times V;V=40ml$