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A 10% aque us solution of cane sugar (mo...

A 10% aque us solution of cane sugar (mol wt. 342) is isotonic with 1.754% aqueous solution of urea. Find the molecular mass of urea.

Text Solution

Verified by Experts

Van.t Hoff factor (i) = 1
`pi_("canesugar")=pi_("urea")`
`C_(1)RT=C_(2)RT`
`C_(1)=C_(2)`
`[(10)/(342)]=[(1.754)/(x)]`
`x=(1.754xx342)/(10)x`
`=59.9868g or 60.06g`
Molecular mass of urea is 59.9868 g.
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Knowledge Check

  • A 5% solution of cane sugar (molecular weight=342) is isotonic with 1% solution of substance X .The molecular weight of X is

    A
    171.2
    B
    68.4
    C
    34.2
    D
    136.2