What is the unit of molality?
Answer and explanation
Correct answer: Mole per kilogram
Molality is defined as the number of moles of solute divided by the mass of solvent in kilograms: m = nsolute ÷ mass of solvent(kg). Therefore, its unit is mol kg⁻¹, or mole per kilogram. It is based on solvent mass, not solution volume; hence mole per litre represents molarity and the other units describe different quantities.
Frequently asked questions
What is the correct answer to this question?
Mole per kilogram
Why is this the correct answer?
Molality is defined as the number of moles of solute divided by the mass of solvent in kilograms: m = nsolute ÷ mass of solvent(kg). Therefore, its unit is mol kg⁻¹, or mole per kilogram. It is based on solvent mass, not solution volume; hence mole per litre represents molarity and the other units describe different quantities.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
