If cooling a solution decreases its volume while moles of solute remain constant, what happens to molarity?
Answer and explanation
Correct answer: Molarity increases
Molarity is the ratio of solute moles to solution volume: M = n/V. In the stated situation, n remains constant while V decreases on cooling. Dividing the same numerator by a smaller denominator gives a larger value, so molarity increases. It does not become zero, and it is not necessarily constant because molarity depends on volume, which changes with temperature.
Frequently asked questions
What is the correct answer to this question?
Molarity increases
Why is this the correct answer?
Molarity is the ratio of solute moles to solution volume: M = n/V. In the stated situation, n remains constant while V decreases on cooling. Dividing the same numerator by a smaller denominator gives a larger value, so molarity increases. It does not become zero, and it is not necessarily constant because molarity depends on volume, which changes with temperature.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
