Question

0.1g mole of urea is dissolved in 100g of water .the morality of the solution is

Answer 1

▶ Correct Question :

0.1 mol of urea is dissolved in 100g of water, find the molality of solution.

▶ Solution :

Given :

Moles of urea = 0.1

Weight of water = 100g

To Find :

Molality of the solution

Concept :

Molality of the solution is defined as ratio of moles os solute to the weight of solvent.

▪ Solute = urea

▪ Solvent = water

Calculation :

$\mapsto\bf\:molality=\dfrac{moles\:of\:solute\times 1000}{(W_{solvent})_{g}}\\ \\ \mapsto\sf\:molality=\dfrac{0.1\times 1000}{100}\\ \\ \mapsto\sf\:molality=0.1\times 10\\ \\ \mapsto\boxed{\bf{\pink{molality=1\:mol\:kg^{-1}}}}$