Question
Chemistry Question on Colligative Properties
Which one of the following aqueous solutions will exhibit highest boiling point?
A
0.01 M Na2SO4
B
0.01 M KNO3
C
0.015 M urea
D
0.015 M glucose
Answer
0.01 M Na2SO4
Explanation
Solution
The greater the value of van't Holf factor, the higher will be the elevation in boiling point and therefore higher will be the boiling point of the solution.
| Solution | Van't Hoff Factor |
|---|---|
| 0.01 M Na2SO4 | 3 |
| 0.01 M KNO3 | 2 |
| 0.015 M urea | 2 |
| 0.015 M glucose | 2 |
Hence, 1.0 M Na2SO4 has the highest value of boiling point.
Therefore, of the following aqueous solutions, 1.0 M Na 2SO4 will exhibit the highest boiling point