1.

Calculate the amount of ice that will separated out when a solution containing 50 g of ethylene glycol in 200 g of water is colled to -9.3^(@)C.""(K_(f)" for "H_(2)O="1.86 K kg mol"^(-1))

Answer»

Solution :`DeltaT_(f)=(1000K_(f)w_(2))/(w_(1)M_(2))`
LET us calculate the amount of WATER `(w_(1))`present when `DeltaT_(f)=9.3^(@)`
`9.3=(1000xx1.86xx50)/(w_(1)xx62)""("MOL. mass of "(CH_(2)OH)_(2)=62)`
`"or"w_(1)=161.29 g`
`therefore"Water frozen to ice "=200-161.29=38.71g`


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