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4 L of 0.02 M aqueous solution of NaCl w...

4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molality of the resultant solution is……..

A

`0.004`

B

`0.008`

C

`0.012`

D

`0.016`

Text Solution

Verified by Experts

The correct Answer is:
D
Given,
`M_(1)=0.02M, V_(1)=4L, M_(2)implies?,V_(2)=4L+1L=5L`
As we know `M_(1)V_(1)=M_(2)V_(2)`
`0.02xx4L=M_(2)xx5L`
`M_(2)=(0.08)/(5)~~0.016m`.
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