Question

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethlene glycol which should be added to 4 kg of water to prevent it form freezing at `-6^(@)C` will be : (`K_(f)` for water `=1.86K kg mol^(-1)`, and molar mass of ethylene glycol `= 62 g mol^(-1)`)
A. 80.32 g
B. 204.30 g
C. 400.00 g
D. 304.60 g

Answer 1

Correct Answer - A
`Delta T_(f)=iK_(f)m, Delta T_(f)=6^(@)C, i=1`
`6=1xx1.86xx(w)/(62xx4)rArr w=804.32 g`