The effect of 2-propanol, ferrous sulfate and copper chloride on the solubility and physicochemical properties of acidic copper sulfate solutions at 298.15 K

Solubility, density and the refractive index were determined for saturated solutions of the systems CuSO4 + H2SO4 + (2-propanol + H2O), CuSO4 + H2SO4 + (FeSO4 + H2O) and CuSO4 + CuCl2 + (H2SO4 + H2O). The experimental study was carried out at 298.15 K, and for different mass ratios of 0.04 of 2-propanol/water, 0.02 and 0.002 of ferrous sulfate/water and 0.1 of sulfuric acid/water, respectively. 2-Propanol has a drowning-out effect, decreasing copper sulphate solubility. No remarkable effect was found when adding FeSO4. With the experimental results obtained, the phase diagrams and their regions were determined. The most important precipitated salt for all the analyzed systems is copper sulfate pentahydrate. The experimental data on solubility and physical properties of the copper sulphate as a function of the sulfuric acid concentration were correlated with empirical equations for all the systems.