If a compound AB dissociates to the extent of 75 % in an aqueous solution, the molality of the solution which shows a 2 . 5   K rise in the boiling point of the solution is ___ molal. (Rounded-off to the nearest integer) K b = 0 . 52 K   kg   mol - 1 .

Question

If a compound AB dissociates to the extent of 75 % in an aqueous solution, the molality of the solution which shows a 2 . 5 &#160; K rise in the boiling point of the solution is ___ molal. (Rounded-off to the nearest integer) K b = 0 . 52 K &#160; kg &#160; mol - 1 .

Aicharya · Accepted Answer

&#945; = 0 . 75 , n = 2 i = 1 - &#945; + n &#945; = 1 - 0 . 75 + 2 &#215; 0 . 75 = 1 . 75 &#916; T b = ik b m or 2 . 5 = 1 . 75 &#215; 0 . 52 &#215; m or, m = 2 . 5 1 . 75 &#215; 0 . 52 = 2 . 74 &#8756; nearest integer answer will be 3

If a compound AB dissociates to the extent of 75 % in an aqueous solution, the molality of the solution…

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