Which concentration unit generally does not change with temperature because volume is not involved?
Answer and explanation
Correct answer: Molality
Molality is moles of solute per kilogram of solvent. Temperature may cause a liquid volume to expand or contract, but the masses of solute and solvent remain essentially unchanged. Therefore molality is generally temperature independent. Molarity, volume percent and mass-volume percent involve volume and can change when volume changes with temperature.
Frequently asked questions
What is the correct answer to this question?
Molality
Why is this the correct answer?
Molality is moles of solute per kilogram of solvent. Temperature may cause a liquid volume to expand or contract, but the masses of solute and solvent remain essentially unchanged. Therefore molality is generally temperature independent. Molarity, volume percent and mass-volume percent involve volume and can change when volume changes with temperature.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
