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)=K_(f)xx(w_(B)xx1000)/(m_(B)xxw_(A))`
`2.8=1.86xx(w_(B)xx1000)/(62xx1000)`
`w_(B)=93`g]