The Conductance of Aqueous Solutions of Potassium Bromide at Temperatures from 15° to 45°C, and the Limiting Mobility of Bromide Ion

Abstract

The conductance of aqueous solutions of potassium bromide at concentrations from 0.0005 N to 0.01 N for temperatures from 15° to 45° C has been measured by the direct-current method previously employed for potassium and sodium chlorides. At 15°, there is a small logarithmic term required to represent the Shedlovsky function Λ′0, but for 25° and higher temperatures, Λ′0 is linear in the concentration. The limiting mobility of bromide ion is obtained from the limiting conductance and the known mobility of potassium ion; the temperature coefficients of the limiting bromide ion mobility are uniformly about 2 percent less than the corresponding values for chloride ion.