Question

`K_(f)` for water is `1.86 K kg mol^(-1)`. IF your automobile radiator holds `1.0 kg` of water, how many grams of ethylene glycol `(C_(2)H_(6)O_(2))` must you add to get the freezing point of the solution lowered to `-2.8^(@)C` ?
A. `72g`
B. `93g`
C. `39g`
D. `27g`

Answer 1

Correct Answer - B
`DeltaT_(f)=ixxK_(f)xxm`
2.8=1xx1.86xx(x)/(62xx1)`
`x=(2.8xx62)/(1.86)=93gm`