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A 1.24 M solution of KI has a density of...

A 1.24 M solution of KI has a density of 1.15 g/cm'. What is the molality of the solution?

A

2.61 m

B

1.31 m

C

4.12 m

D

3.12 m

Text Solution

Verified by Experts

The correct Answer is:
B
As molality `m= M/(1000d - MM_2) xx1000`
where, M=molarity of solution and `M_2` = mass of KI in gram.
`=(1.24 xx 1000)/(1000xx1.15-166xx1.24) = 1.31 m`
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