The Equilibrium Constant of the Bromine Hydrolysis and its Variation with Temperature

Abstract

1. The conductivities of aqueous bromine solutions have been measured at five temperatures ranging from 0 to 35°, and the values of Kx, the equilibrium constant for the bromine hydrolysis, calculated for these temperatures. 2. The conductance of hydrobromic acid has been measured over the same temperature range; limiting values for its equivalent conductance at five temperatures have been given. 3. The results of earlier investigations have been recalculated and shown to yield values of K1 in substantial agreement with those newly determined. 4. The temperature variation of the K1 for bromine becomes anomalous in the neighborhood of 0°; but the departure of d(log K1)/d(1/T) from constancy is much less than that observed by Jakowkin in the case of chlorine. 5. The existence of pentabromide ion is highly probable; the values of (Br-)(Br2)2/(Br5) are calculated to be 0.025 at 0° and 0.050 at 25°, in agreement with the results of earlier investigations. © 1934, American Chemical Society. All rights reserved.