Abstract
Zinc solubility in the ZnCl 2NH 4ClNH 3H 2O system for chloride concentrations lower than 5 m in the temperature range 30–50°C was studied. The experimental results show that, for chloride concentrations between 3.5 and 5.0 m, the zinc solubility is determined by the solubility of the zinc diammine chloride. For chloride concentrations lower than 3.0 m, there are two zinc compounds, the hydroxide Zn (OH) 2 and the hydroxychloride Zn(OH) 1.6Cl 0.4, on which the solubility of zinc depends, according to the value of the ratio [NH 3] Total/[Zn] Total.
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