Question

Why is molality prefered over molarity 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.

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Answer 2

Answer:

Molarity=

Volumeofsolution(L)

Molesofsolute

Molality=

massofsolvent(kg)

molesofsolute

The volume changes with temperature while the mass of solvent is independent of solvent.

Therefore, the molarity changes with temperature but the molality is constant.

Therefore, molality is preferred over molality in expressing the concentration of the solution.

or

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:

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