Apparent molar volume of alkali metal formates in formic acid-water mixtures

K Chowdaji Rao, S Brahmaji Rao

Abstract


The apparent molar volumes of formates of lithium, sodium and potassium in different mixtures offormic acid and water at 30° C have been calculated from the experimentally determined densities.The molar volume increased with concentraton in pure water while it decreased with concentrationin aqueous formic acid mixtures. At any concentration of the salt the volume varied non-linearlywith the composition of the solvent and exhibited a maximum at about 40%, 60% and 80% offormic acid for lithium, sodium and potassium formates respectively.

Keywords


Apparent molar volume; viscosity; density; alkali metal formates; formic acid.

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