Answer:
102.4 °C
Explanation:
There are four colligative properties :
a) elevation in boiling point
b) depression in freezing point
c) relative lowering of vapor pressure
d) osmotic pressure
When we add a non volatile solute in a solvent, the solution has higher boiling point as compared to the pure solvent, this is known as elevation in boiling point.
The elevation in boiling point is related to molality as:
elevation in boiling point =i X KbXmolality
Kb (water) = 0.512
molality given as = 1.56 m
i = vant hoff factor =3 (for calcium chloride)
Putting values
elevation in boiling point = 3X0.512X1.56 = 2.4
Thus the boiling point of aqueous solution will be = 100+2.4 = 102.4 °C
