1.

A solution of glycerol (C_(3)H_(8)O_(3)), molar mass ="92 g mol"^(-1), in water was preapred by dissolving some glycerol in 500 g of water. This solution has a boiling point of 100.42^(@)C. What mass of glycerol was dissolved to make this solution? K_(b) for water ="0.512 K kg mol"^(-1).

Answer»


SOLUTION :`DeltaT_(B)=(100K_(b)w_(2))/(w_(1)M_(2))"or"w_(2)=(w_(1)M_(2)DeltaT_(b))/(1000K_(b))=(500xx92xx0.42)/(1000xx0.512)=37.7g`


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