* Application of compounds

* The hydrogen system is a traditional and widely used method for the analysis of cations. It is based on the significant differences in the solubility of the various ions and divides common cations into five groups. Due to the high toxicity of H2S gas and inconvenient storage, the aqueous solution of acetamide (CH3CSNH2, TAA) is generally used as a precipitant.

In acidic solution, TAA hydrolyzes to produce H2S, which can replace H2S: CH3CSNH2 + H + 2H2O ⇌ CH3COOH + NH4 + H2S ↑ Hydrolysis in ammonia solution to generate HS, instead of (NH4)2S: CH3CSNH2 + 2NH3 ⇌ CH3-C (- NH2) = NH + NH4 + HS is hydrolyzed in an alkaline solution to form S, which can be used as an alternative to Na2S: Other uses of CH3CSNH2 + 3OH ⇌ CH3COO + NH3 + H2O + S * are:

Dimethyl molybdenum is a catalyst in organic synthesis. Due to the poisoning of common hydrogenation catalysts by the presence of organic compounds such as thiophene, di-molybdenum can be used to catalyze the hydrogenation of organic substances. * Cadmium can be used to make photovoltaic cells. * Lead is used to make infrared sensors. Multi-calcium, polyoxime, and poly-ammonium are fungicides and insecticides. Double carbon is used industrially as a solvent. In addition, carbon dioxide is also used to produce carbon tetrachloride. In organic chemistry, carbon dioxide is inserted into the -C(=S)-S- group. * Zinc and cadmium chloride are used to make phosphors, and high purity cadmium oxide is a good semiconductor. Three phosphorus tetraphosphates are used to make matches and pyrotechnics. Ten times of tetraphosphorus is used to make insecticides, lubricant additives and flotation agents. *Sodium is widely used in the manufacture of dyestuffs, production of organic medicines and pulps. * Calcium and Xenon are used to make luminescent paints.