Palladous Sulphate, PdSO₄

Palladous Sulphate, PdSO₄.2H₂O may be prepared in a variety of ways, notably by heating palladium with concentrated sulphuric acid, or a mixture of this with nitric acid; by heating palladous nitrate with sulphuric acid until all nitrous fumes have been expelled; by dissolving hydrated palladous oxide in sulphuric acid; and finally by fusing palladium and potassium hydrogen sulphate. The salt yields reddish brown crystals, which deliquesce in moist air. Soluble in water, they are decomposed in excess of that liquid, yielding a basic derivative, to which the formula PdSO₄.7PdO.6H₂O has been given.