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The observed osmotic pressure for a 0.10...

The observed osmotic pressure for a `0.10M` solution of `Fe(NH_(4))_(2)(SO_(4))_(2)` at `25^(@)C` is `10.8 atm`. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively: `(R = 0.082 L atm k^(-) mol^(-1))`

A

3 and `5.42`

B

5 and `3.42`

C

4 and `4.00`

D

5 and `4.42`

Text Solution

Verified by Experts

The correct Answer is:
D
`pi = CRTi`
`i=(pi)/(CRT) = (10.8)/(0.1 xx 0.0821 xx 298)`
`i=4.42` (observed)
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