Question

What would be the freezing point of a 1.7 mole aqueous ethylene glycol solution? The freezing point depression constant for water = 1.86 degrees Celsius per mole.


a) 3.2°C

b) – 1.1°C

c) 0.0°C

d) – 3.2°C

Answer 1

Answer:

The freezing point of a 1.7 mole aqueous ethylene glycol solution is 3.2°C

Explanation:

Moles present in aqueous ethylene glycol solution= m=1.7

Depression constant for water = $K_b$= 1.8 deg C/m

According to formula  

$T_f=K_b*m$

$T_f$=1.8* 1.7

=3.2

Hence the freezing point of aqueous ethylene glycol solution is 3.2°C