Question

A molal solution is one that contains one mole of a solute in:

• A. 1000 g of the solution
• B. 1000 cc of the solution
• C. 1000 cc of the solvent
• D. 1000 g of the solvent

Answer 1

The correct option is D 1000 g of the solvent

Molality is a measure of the concentration of a solute in a solution in terms of an amount of substance in a specified amount of mass of the solvent. The molality $\left(b\right)$, of a solution, is defined as the amount of substance (in mol) of solute,$n_{solute}$ divided by the mass (in kg) of the solvent,

$m_{solvent}$ $b=\frac{n_{solute}}{m_{solvent}}$. A molal solution is one that contains one mole of solute in $1$ kg of solvent or $1000$ g of solvent.