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What would be the molality of 20% (mass/...

What would be the molality of 20% (mass/mass) aqueous solution of KI ?
(molar mass of KI `= 166 g mol^(-1)`)

A

1.48

B

1.51

C

1.08

D

1.35

Text Solution

Verified by Experts

The correct Answer is:
B
20% (mass/mass) means
100 gm of solution has 20 gm of KI `rArr` 80 gm of solvent contains 20 gm of KI
Molality, `m = (20)/(166) xx (1000)/(80) = 1.506 ~~ 1.51 m`
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