Define (i) Molality (ii) Normality

Explanation

(i) Molality (m): It is defined as the number of moles of the solute present in 1 kg of the solvent
`m = ("Number of moles of solute")/("Mass of the solvent (in kg)")`
(ii) Normality (N): It is defined as the number of gram equivalents of solute in 1 litre of the solution.
`N= ("Number of gram equivalent of solute")/("Volume of solution (in L)")`