If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0 . 3 , then the observed freezing point will be _____ % higher than the expected/theoretical freezing point. (Nearest integer).

Step-by-step solution

HA 1 - α ⇋ H + α + A - α Van't Hoff factor, i = 1 + α n - 1 = 1 + 0 . 3 2 - 1 = 1 + 0 . 3 = 1 . 3 ∆ T f without considering dissociation = k f × molality ∆ T f without considering dissociation = ik f × molality = ΔT f ' ΔT f ' - ΔT f = 0 . 3 ( k f × molality) ΔT f 1 - ΔT f ΔT f = 0 . 3 k f × molality k f × molality = 0 . 3 % value = 30