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10g of an organic substance when dissolv...

10g of an organic substance when dissolved in two litres of water gave an osmotic pressure of 0.59 atm, at `7^(@)C`. Calculate the molecular weight of the substance.

Text Solution

Verified by Experts

`pi=("Moles of solute")/("Litres of solution")xxRT`
`0.59=(10xx0.082xx280)/(Mxx2)`
`M=(10xx0.82xx280)/(2xx0.59)="194.6 g/mol"`
`"Molecular weight = 194.6 g/mole"`
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