Question

Question No. 6
The properties which depend only on the
number of solute particles and not on the
nature of the solute are colligative properties.
The four colligative properties are (i) relative
lowering of vapour pressure, (ii) elevation in
boiling point, (iii) depression in freezing point,
(iv) osmotic pressure. If a non-volatile solute is
added to the solvent, vapour pressure of the
solution decreases and thus boiling point
increases and freezing point decreases.
The addition of 3 g of a substance to 100 g CCl4
(M = 154 g mol-1) raises the boiling point of
CCl4 by 0.60°C. Kb of CCl4 is 5.03 K kg mol-1,
Kf of CCl4 is 31.8 K kg mol-1 and density of
solution is 1.64 g cm-3.
The osmotic pressure of the solution is?​

Answer 1

he properties which depend only on the

number of solute particles and not on the

nature of the solute are colligative properties.

The four colligative properties are (i) relative

lowering of vapour pressure, (ii) elevation in

boiling point, (iii) depression in freezing point,

(iv) osmotic pressure. If a non-volatile solute is

added to the solvent, vapour pressure of the

solution decreases and thus boiling point

increases and freezing point decreases.

The addition of 3 g of a substance to 100 g CCl4

(M = 154 g mol-1) raises the boiling point of

CCl4 by 0.60°C. Kb of CCl4 is 5.03 K kg mol-1,

Kf of CCl4 is 31.8 K kg mol-1 and density of

solution is 1.64 g cm-3.