Cupric phosphide

When passed through a solution of cupric sulphate, it causes a black precipitate of cupric phosphide —... 

Cupric phosphide, Cu3P2.—This phosphide is a black substance... 

There is an older, alternate naming system for the transitional metals when they ionically bond to form salt compounds. There may be chemicals encountered still using this older naming system, therefore, responders should be familiar with it. In this system, the suffixes ic and ous are used to indicate the higher and lower valence numbers (outer-shell electrons) of a transitional metal. For example, if copper I combines with chlorine, the name would be cuprous chloride. If copper I combines with oxygen, the name would be cuprous oxide. The lowest number of electrons in the outer shell of copper is one. When the metal with the lowest number of electrons is used, the suffix in the alternate naming system is ous. When the metal with the highest number of electrons is used, the suffix is ic. If copper n conbined with phosphorus, it would create cupric phosphide. For example, copper II combined with chlorine would create cupric chloride. 

Small Quantities (White Phosphorus). Wear nitrile rubber gloves, laboratory coat, and eye protection. Work in the fume hood. Five g (0.16 mol) of white phosphorus are cut under water into 5mm pellets. The pellets are added to 800 mL (0.8 mol) of 1 M cupric sulfate (127.7 g or 199.7 g of CuS04 or CuS04-5H20, respectively, dissolved in 800 mL of water) solution in a 2-L beaker. The mixture is allowed to stand for about a week with occasional stirring. The phosphorus grad-ually disappears, and a fine black precipitate of copper and copper phosphide is formed. The reaction is complete when no waxy white phosphorus is observed when one of the pellets is cut under water. The precipitate is separated, and while still wet, transferred to 500 mL of laundry bleach (5% sodium hypochlorite), and then stirred for about 1 hour to ensure complete decomposition of copper phosphide. The solids are separated and packaged for disposal. The aqueous solution is washed into the drain.33... 

Phosphorus is a reducing agent. When immersed in cupric sulfate solution, it becomes covered with a coating of metallic copper. In silver nitrate solution it produces a black deposit of silver phosphid. 

Calcium oxide Cupric sulfate anhydrous Cupric sulfate pentahydrate Di-iron phosphide steel mfg., specialty Calcium silicon steel priming Zinc potassium chromate steel processing Bismuth... 

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