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Osmotic Pressure

A 5% soluti...

Question

A $5 %$ solution of cane sugar (mol.wt $342$ ) is isotonic with $0.877 %$ solution of urea. Find the molecular weight of urea.

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Solution

$∴$ No. of moles of cane sugar urea is an equal volume of solution is equal.

considering 100gm of solution,

$\frac{5}{342} = \frac{0.877}{M}$

$\Rightarrow M = 59.98 ≃ 60$

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Q. A 5% solution (w/v) of cane-sugar (Mol. weight= 342) is isotonic with 0.877% (w/v) of urea solution. Find molecular weight of urea (round off to the nearest integer).

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