Chemical reactions of the elementsReaction of phosphorus with airWhite phosphorus glows in the dark when exposed to damp air in a process known as chemiluminescence. White phosphorus must be handled with great care. It spontanteously ignites in air at about room temperature to form "phosphorus pentoxide" - actually tetraphosphorus decaoxide, P4O10. P4(s) + 5O2(g) → P4O10(s) Under careful control (75% O2, 25% N2, 50°C, 90 mm Hg), a mixture is formed, one of the products within which is "phosphorus trioxide" - actually tetraphosphorus hexaoxide, P4O6. P4(s) + 3O2(g) → P4O6(s) Reaction of phosphorus with waterWhite phosphorus glows in the dark when exposed to damp air in a process known as chemiluminescence. Reaction of phosphorus with the halogensWhite phosphorus, P4, reacts vigorously with all the halogens at room temeperature to form phosphorus trihalides. So, it reacts with fluorine, F2, chlorine, Cl2, bromine, Br2, and iodine, I2, to form respectively phosphorus(III) fluoride, PF3, phosphorus(III) chloride, PCl3, phosphorus(III) bromide, PBr3, and phosphorus(III) iodide, PI3. P4(s) + 6F2(g) → 4PF3(g) P4(s) + 6Cl2(g) → 4PCl3(l) P4(s) + 6Br2(g) → 4PBr3(l) P4(s) + 6I2(g) → 4PI3(g) White phosphorus, P4, reacts with iodine, I2, in carbon disulphide (CS2) to form phosphorus(II) iodide, P2I4. The same compound is formed in the reaction between red phosphorus and iodine, I2, at 180°C. P4(s) + 4I2(g) → 2P2I4(g) Reaction of phosphorus with acidsPhosphorus does not react with dilute non-oxidizing acids. Reaction of phosphorus with basesWebElements ShopWebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, molecular models, and more.
|
|||||||||
 
|
|
