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Molecular formula : CAS :
nature : sulfur oxidation state of 2 compounds. Including metal sulphides, and non-metallic sulfides such as ammonium sulfide. Most sulfide, especially metal sulfides, as is hydrogen sulfate salt. The hydrogen sulfate acid salt is acid-hydrogen sulphide or sulfide, which are insoluble in water. Soluble metallic sulphide dissolved in water and hydrolysis occurred, significantly alkaline aqueous solution. A few metal sulphides complete hydrolysis of water-generation metal hydroxides and emit hydrogen sulfide, as three two aluminum sulfide, three vulcanization two chromium, magnesium sulphide. The vast majority of heavy metal sulphides difficult to dissolve in water. In analytical chemistry, using sulfide in different pH conditions of the different solubility may contain different metal ions of the salt solution will be its mutual separation. The main non-metallic sulfide three phosphorus pentasulfide, phosphorous pentasulphide, three two arsenic sulfide, five arsenic sulfide two, but not dissolve in water. There are many nature-based sulphide ores, such as copper - and-silver, such as Galena.
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