Solutions and Colligative Properties Test - 1

This is in accordance with Henry's law.

'At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to partial pressure of that gas in equilibrium with that liquid.'

When acetone is added to ethanol, the molecules of acetone occupy the spaces between ethanol molecules. Consequently, some hydrogen bonds in alcohol molecules break and the attractive forces in ethanoic molecules are weakened. The escaping tendency of ethanol and acetone molecules increases. As a result, the vapour pressure of the solution is greater than the expected vapour pressure.

For ideal conditions, mixing of heat and mixing of volume must be zero and there should be no interaction between the solute-solvent, solvent-solution, solvent-solvent, etc.

Azeotrope is a liquid mixture that boils at a constant temperature at a certain composition.

Δ T_f = K_f x m

Ethylene glycol solution shows a lower freezing point than pure ethylene glycol. Thus, glycol is used as antifreeze in automobiles.

As Al₂(SO₄)₃ has maximum ions, so it has the highest boiling point.