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2 molal solution of a weak acid HA has a freezing point of 3 . 885 ° C . The degree of dissociation of this acid is ______ × 10 - 3 . (Round off to the Nearest Integer). [ Given : Molal depression constant of water = 1 . 85   K   kg   mol - 1 Freezing point of pure water = 0 ° C

Correct answer

0

Step-by-step solution

Δ T f = ( 1 + α ) K f × m 3 . 885   =   ( 1 + α ) × 1 . 85   × 2 α = 0 . 05 = 50 × 10 - 3

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