1.

A 5% solution of cane sugar (molar mass 342) is isotonic with 1% of a solution of an unknown solute. The molar mass oftmknown solute in g/mol is :

Answer»

`171.2`
`68.4`
`34.2`
`136.2`

SOLUTION :For isotonic SOLUTIONS
`PI _(1) =pi_(2)`
`C_(1) =C_(2)`
`(5//342)/(0.1) =(1//M)/(0.1)`
`(5)/(342) =1/M`
`impliesM =(342)/(5) IMPLIES 68.4` gm/mol


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