In which situation is molality preferred over molarity?
Answer and explanation
Correct answer: When temperature is changing
Molality is based on moles of solute per kilogram of solvent. Mass does not change appreciably with temperature, whereas solution volume can change because liquids expand or contract. Consequently, molality remains more stable when temperature changes. Colour, a name alone, or absence of solvent does not provide a basis for choosing molality.
Frequently asked questions
What is the correct answer to this question?
When temperature is changing
Why is this the correct answer?
Molality is based on moles of solute per kilogram of solvent. Mass does not change appreciably with temperature, whereas solution volume can change because liquids expand or contract. Consequently, molality remains more stable when temperature changes. Colour, a name alone, or absence of solvent does not provide a basis for choosing molality.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
