1.

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

Answer»

136.2
171.2
68.4
34.2

Solution :ISOTONIC solutions have equal molar concentrations. HENCE,
`(5//342)/(100)xx1000=(1//M)/(100)xx1000"or"(5)/(342)=(1)/(M)"or"M=68.4`


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