Q.

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

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answer is 68.4.

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Detailed Solution

For non-electrolytic solutions, if isotonic, C1=C2;=5×1000342×100=1×1000Mw2×100 ∴ Mw2=68.4
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A 5% solution of cane sugar (molecular weight = 342) is isotonic with 1% solution of substance X. The molecular weight of X is