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Question: > The molarity of the solution containing 2.8%( mass / volume) solution of KOH is : (Given atomic ma...

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

A

0.1 M

B

0.5 M

C

0.2 M

D

1 M

Answer

0.5 M

Explanation

Solution

(2)

Weight of KOH = 2.8 gram

Volume of solution = 100 ml

M=2.8×100056×100=2856=0.5MM = \frac{2.8 \times 1000}{56 \times 100} = \frac{28}{56} = 0.5M