Question

56. To neutralize completely 20 mL of 0.1 M aqueous solution of phosphorus acid, the volume of 0.1 M aqueous KOH solution required is: (a) 10 ml (b) 40 mL (C) 60 mL (d) 80 mL

NEET/Medical Exams

Chemistry

Solution

2.7 (3 ratings)

( H_{3} P O_{3}+2 K O H rightarrow K_{2} H P O_{3} ) ( +2 H_{2} O ) ( M_{1} V_{1} X_{1}=M_{2} V_{2} X_{2} ) ( 0.1 times 20 times 2=0.1 times V_{2} times 1 ) ( V_{2}=40 m l )