Question

Que: 1 by 10 mole of a solute is dissolved in 100g of solvent.Calculate the molality of the solution.​

Answer 1

Answer:

Molality:

The molality of a solution is defined as the number of moles of solute dissolved in 1 kg of the solvent. It is represented by the symbol, m.

• Number of moles of solute = 1/10 = 0.1 mol
• Mass of solvent = 100 g
• Molality = ?

$\footnotesize\implies Molality = \dfrac{Moles \: of \: the \: solute}{Mass \: of \: the \: solvent \: in \: Kg}$

$\footnotesize\implies Molality = \dfrac{Moles \: of \: the \: solute \times 1000}{Mass \: of \: the \: solvent \: in \: g}$

$\footnotesize\implies Molality = \dfrac{0.1 \times 1000}{100}$

$\footnotesize\implies Molality = 0.1 \times 10$

$\footnotesize\implies \bf Molality =1 \: molal$

Answer 2

mole of solute = 1/10 = 0.1

mass of solvent = 100g = 0.1kg

molality = ?

molality = mole of solute / mass of solvent in kg

molality = 0.1/0.1 = 1 m