Spectrophotometric Investigation of the Copper (II)-chloro Complexes in Aqueous Solutions of Unit Ionic Strength

Abstract

The absorption spectra of mixed solutions of copper(II) perchlorate, perchloric acid and hydrochloric acid at a constant ionic strength of 1.00 in the wave length range 250-300 mµ are interpreted in terms of the equilibria Cu++ + C1−= CuCl+, K1(25.2°) = 1.30 ± 0.03; K1(46.9°) = 1.39 ± 0.05 liters/mole. CuCl+ + Cl−= CuCl2 K2(25.2°) = 0.23 ± 0.15 liter/mole. The absorption spectra of CuCl+ and CuCl2 have been determined in the given wave length range. © 1950, American Chemical Society. All rights reserved.