Question

Explain molarity and molality

Answer 1

Molar concentration is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of amount of substance per unit volume.Molality, also called molal concentration, is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent. This contrasts with the definition of molarity which is based on a specified volume of solution.

Answer 2

MOLARITY:- The number of moles of solute present in one litre of solution is called molarity.

MOLARITY= no of moles of solute(n)
_________________
volume of solution in lit

MOLALITY:- The number of moles of solute present in 1 kg(1000grms) of solvent is called molality.

MOLALITY=no of moles of solute
________________
mass of solvent in kg