Synthesis of Cadmium(II) sulfide

Cadmium(II) hydroxide is prepared by dissolving 3 g of cadmium(II) nitrate in 10 mL of water, where to a solution prepared from 0.78 g of NaOH in 10 mL of water is added with stirring. The mixture is acidified with conc. hydrochloric acid in order to prepare cadmium(II) chloride, whereto a solution prepared from 0.7 g of sodium sulfide in 5 mL of water is added with stirring. The mixture is filtered, washed with water and dried in open air.

Cd(NO3)2 + 2 NaOH = Cd(OH)2 + 2 NaNO3

Cd(OH)+ 2 HCl = CdCl2 + 2 H2O

CdCl+ Na2S = CdS + 2 NaCl

Source

Addition of the NaOH

Addition of the HCl

Addition of the Na2S

The dry product

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