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A 0.004M solution of Na(2)SO(4) is isoto...

A `0.004M` solution of `Na_(2)SO_(4)` is isotonic with a `0.010M` solution of glucose at same temperature. The apparent degree of dissociation of `Na_(2)SO_(4)` is

A

`25%`

B

`50%`

C

`75%`

D

`85%`

Text Solution

Verified by Experts

The correct Answer is:
C
`{:(Na_(2)SO_(4),,hArr,,2Na^(+),,+,,SO_(4)^(2-)),((0.004-x),,,,2x,,,,x):}`
Since both the solution are istonic `0.004+2x=0.01`
`:.x=3xx10^(-3)`
`:.` Present dissociation `=(3xx10^(-3))/(0.004)xx100=75%`
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