Question

The freezing point of a 0.50 molal aq. solution of weak acid (HA) is -1.302°C. The dissociation constant of acid HA is [Given: Kf for water = 1.86 kg mol-1 K]​

Answer 1

The freezing point of a 0.50 molal aq. solution of weak acid (HA) is -1.302°C. The dissociation constant of acid HA is [Given: Kf for water = 1.86 kg mol-1 K]

The freezing point of a 0.50 molal aq. solution of weak acid (HA) is -1.302°C .

Kf for water = 1.86 kg mol-1 K

The dissociation constant of acid HA is given

____________

Ka = (0.4)² / 1-0.4

= 0.26