If molarity and molality can have nearly the same value, when is it approximately possible?
Answer and explanation
Correct answer: In very dilute aqueous solution
Molarity uses moles per litre of solution, whereas molality uses moles per kilogram of solvent. In a very dilute aqueous solution, the solution density is close to that of water and the solution volume and solvent mass have nearly corresponding numerical values. Therefore, the two concentrations may be approximately equal, not universally equal.
Frequently asked questions
What is the correct answer to this question?
In very dilute aqueous solution
Why is this the correct answer?
Molarity uses moles per litre of solution, whereas molality uses moles per kilogram of solvent. In a very dilute aqueous solution, the solution density is close to that of water and the solution volume and solvent mass have nearly corresponding numerical values. Therefore, the two concentrations may be approximately equal, not universally equal.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
