1.48. What is the difference between molality and molarity?
1.48. What is the difference between molality and molarity?
1.48.
Molarity | Molality |
The molarity of a given solution is defined as the total number of moles of solute per litre of solution. | Molality is defined as the total moles of a solute contained in a kilogram of a solvent. |
The mathematical expression is- M = number of moles of the solute /Volume of solution given in terms of litres. M = (g ? 1000)/(W ? V). | The mathematical expression is- m = Numbers of moles of solute/Mass of solvent in kgs m = (g ? 1000)/(W ? m). |
Depends on the volume of the whole solution. | Depends on the mass of the solvent. |
Unit sign expressed as (M). | Unit sign expressed as (m). |
Molarity has a unit of mol/litre. | Molality has units of mol/kg. |
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