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 near

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 K rise in the boiling point of the solution is  molal. (Rounded-off to the nearest integer)

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Canvas Classes · Accepted Answer

Strategy:
 First, calculate the van't Hoff factor () for the dissociated compound . Then, use the boiling point elevation formula  to solve for the molality .

Step 1: Calculate van't Hoff factor ()
 (). Degree of dissociation .

Step 2: Calculate molality ()
, .

Rounding to the nearest integer: 3.

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