1.

Define molarity and molality.

Answer»

Solution :(i) Molarity is the NUMBER of moles of solute dissolved in one LITRE of the solution.
Molarity (M) = `("Moles of solute")/("volume of solution in litre")`
(ii) Molality is the no. of moles of the solute per kilograms of the solvent .
Molality (m) = `("Moles of solute ")/("Mass of the solvent in KG ")` .


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