Sulfate
Preparation

Typically metal sulfates are prepared by treating metal oxides, metal carbonates, or the metal itself with sulfuric acid:

Although written with simple anhydrous formulas, these conversions generally are conducted in the presence of water. Consequently the product sulfates are hydrated, corresponding to zinc sulfate ZnSO · 7H O, copper(II) sulfate CuSO · 5H O, and cadmium sulfate CdSO · H O.

Some metal sulfides can be oxidized to give metal sulfates.
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