If the molality of a solution is 2, what does it mean?
Answer and explanation
Correct answer: There are 2 moles of solute in 1 kg of solvent.
Molality is defined as moles of solute per kilogram of solvent, not per litre of solution. Therefore, molality 2 means 2 mol kg⁻¹: 2 moles of solute are present for every 1 kg of solvent, making option A correct. Option B is the definition of molarity, while C and D use incorrect quantities and units for molality.
Frequently asked questions
What is the correct answer to this question?
There are 2 moles of solute in 1 kg of solvent.
Why is this the correct answer?
Molality is defined as moles of solute per kilogram of solvent, not per litre of solution. Therefore, molality 2 means 2 mol kg⁻¹: 2 moles of solute are present for every 1 kg of solvent, making option A correct. Option B is the definition of molarity, while C and D use incorrect quantities and units for molality.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
