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x g of non-electrolytic compound (molar ...

`x g` of non-electrolytic compound (molar mass =200) is dissolved in `1.0 L` of `0.05 M NaCl` solution. The osmotic pressure of this solution is found to be `4.92 atm` at `27^(@)C`. Calculate the value of `x`. Assume complete dissociation of `NaCl` and ideal behaviour of this solution.

Text Solution

Verified by Experts

a. For `NaCl : pi =iCRT = 2xx0.05xx0.0821xx30`
`= 2.463` ,
b.For unknown compound:
`pi=CRT=pi/200xx0.0821xx300=0.1231x atm`
Total osmotic pressure `pi=pi_(1)+pi_(2)`
`4.92=2.463+0.1231x`
`x = 19.959 g`
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