A system of physical chemistry - Index of

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A system of physical chemistry - Index of

MASS ACTION EQUILIBRIUM IN SOLUTIONS 153

If we choose the concentrations, i.e. the dilutions, of the solute in the

two solvents in such a manner that the degrees of dissociation are the

same, the above relation becomes—

or D ^'V = constant for a given value of y.

This relation had already been discovered as a purely empirical one

by Walden {Zeitsch. phys. Chem., 54, 129 (1906)) as a result of measurements

carried out with tetra-ethylammonium iodide in a number of

solvents. The following are a few of Walden's results. In each case

the dilution term V denotes the dilution at which the degree of ionisation

has the value assigned to it at the head of the table :—

y = 0-83

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