Preparation of Crystalline Cadmium Sulphide

Preparation of Crystalline Cadmium Sulphide. Dissolve 3 g of cadmium sulphate in 80 ml of water, add 20 ml of a 1 N sulphuric acid solution to the reaction vessel, and pass a stream of hydrogen sulphide through it up to complete precipitation of cadmium sulphide. Filter off the cadmium sulphide precipitate, wash it several times with water saturated with hydrogen sulphide, remove it from the filter, and dry it in a drying 

Prepare a thoroughly ground mixture of 1 g of the cadmium sulphide obtained previously, 5 g of sulphur, and 5 g of potassium carbonate. Transfer the mixture into a porcelain crucible, and fuse it at the lowest possible temperature. 

Next cool the crucible and treat the product with water. Separate the prepared cadmium sulphide crystals and examine their shape with a magnifying glass. 

Preparation of Autocomplex Cadmium Iodide. Pour 20 ml of a 10% cadmium sulphate solution 

After an hour, extract the unreacted zinc. Filter off the separated metal through a paper filter, wash it with hot water, and dry it in the air. 

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Preparation of Zinc Iodide in Absolute Ether (262). 8. Preparation of Zinc Oxyacetate (262). 9. Preparation of Crystalline Cadmium Sulphide (263). 10. Preparation of Autocomplex Cadmium Iodide ( 3). 11. Preparation of Cadmium Pigments (263). 

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