Question

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at `-6^(@)C` will be `(K_(f)` for water `= 1.86 Kkg mol^(-1)`, and molar mass of ethylene glycol `=62 g mol^(-1))`
A. `204.30g`
B. `400.08g`
C. `304.60g`
D. `804.32g`

Answer 1

Correct Answer - D
Mass of glycol, `W_(2)=(M_(2)xxW_(1)xxDeltaT_(f))/(1000xxK_(f))`
`=(62xx4000xx6)/(1000xx1.86)=800` g
Mole of `CH_(3)OH = 5.2`.