Question

why molality is preferred over molarity in expressing the concentration of a solution?

Answer 1

Answer:

Molarity is number of moles per unit volume of the solution and molality is number of moles per unit mass of solvent. Volume is temperature dependent where as mass is constant at all temperatures. So, molality remains constant but molarity changes with temperature. Hence , molality is preferred over molarity.

Explanation:

Answer 2

Answer:

Molarity is a function of volume and volume varies with temperature.

On the other hand, Molality is a function of mass and mass does not vary with temperature.

hence, molality is preferred over morality.

Explanation:

The number of moles of solute per liter volume of solution is known as Morality.

The number of moles of solute per 1000g of solvent is known as Molality.

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