Question

What volume of a 20 N $NaOH$ solution should be added to prepare 400 mL of a 1 N solution?

• A. 70 mL
• B. 40 mL
• C. 20 mL
• D. 50 mL

Answer 1

The correct option is C 20 mL

Let the volume of 20 N solution is V mL.
$N_1{V}_1=N_2{V}_2$
$(20\times V)=(1\times 400)$
So, the volume of 20 N $NaOH$ required = 20 mL