Which statement about molarity and molality is correct?
Answer and explanation
Correct answer: Molarity may be affected by temperature
Molarity is moles of solute per litre of solution, so it depends on solution volume. Since volume can expand or contract with temperature, molarity may change. Molality instead uses kilograms of solvent, and its unit is mol kg−1. Therefore, option C is correct; options A, B, and D incorrectly interchange definitions or units.
Frequently asked questions
What is the correct answer to this question?
Molarity may be affected by temperature
Why is this the correct answer?
Molarity is moles of solute per litre of solution, so it depends on solution volume. Since volume can expand or contract with temperature, molarity may change. Molality instead uses kilograms of solvent, and its unit is mol kg−1. Therefore, option C is correct; options A, B, and D incorrectly interchange definitions or units.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
