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  4. If osmotic pressure of 5 %( w / v ) solution of sucrose is same as 3 %( w / v ) solution of 'X' find molecular mass of X.

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Q. If osmotic pressure of $5 \%( w / v )$ solution of sucrose is same as $3 \%( w / v )$ solution of 'X' find molecular mass of X.

JIPMERJIPMER 2018Solutions

Solution:

$i _{1} c _{1}= i _{2} c _{2}$
$\frac{5 \times 1000}{342 \times 100}=\frac{3}{ M } \times \frac{1000}{100}$
$M =\frac{3}{5} \times 342=205.2$