Question

The molarity of the solution containing 2.8% mass-volume solution of KOH. (Given atomic mass of K = 39) is

• A. 0.1 M
• B. 0.5 M
• C. 0.2 m
• D. 1 M

Answer 1

The correct option is B

0.5 M

M W of K O H =56

100 ml of solution contain 2.8 gm

1000 ml of solution contain 28 gm

Molarity =$\frac{28}{56}$ = 0.5