Synthesis of Cadmium(II) nitrate

16.8 g of metallic cadmium is covered with 20 mL of water, which is then placed on a heating plate and heated to 60°C. A slow addition of 36.5 g of 65% nitric acid is started, after which the mixture is heated until no more nitrous fumes exhaust from the solution. The cadmium metal pieces are removed and the solution is poured into an evaporation dish, that is heated to about 100°C to remove water. Temperature control is mandatory, the residue can be dried in a desiccator to obtain a tetrahydrate.

Cd + 4 HNO3 = 2 NO2 + 2 H2O + Cd(NO3)2 ⋅ 4H2O

Source

The cadmium metal immersed in water

Reaction taking place

The cadmium metal residue

The product

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