Chem

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Does molality or molarity vary with temperature, or are they both temperature independent?

  • Chem -

    Molarity = # mols/L. # mols = grams/molar mass. The mass of a solute doesn't change with temperature. But volume will; therefore, molarity will change as the density of solvent changes with temperature.
    Molality = # mols/kg solvent. In light of the preceding paragraph, do you think molality will change with termperature?

  • Chem -

    no because it is the ratio of no of moles of solute and mass of solvent in kg so mass remain constant at any termperature and molality will not change with termperature.

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