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Question

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Which of the following aqueous solution should have a highest boiling point?

1.0 M NaOH

1.0 M Na₂SO₄

1.0 M NH₄NO₃

10 MKNO₃

Solution

B.

1.0 M Na₂SO₄

It depends on the Van't Hoff factor.

Van't Hoff factor is directly proportional to the boiling point.

In the case of Na₂SO_3, i is maximum = 3

Hence it has maximum boiling points.

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