The sodium hydroxide (Caustic rubbed, the caustic soda) Is applied by NaOH in production of artificial fibers: in the paper and textile industry; in soap manufacture; for cleaning of coppers of a scum; in galvanotechnics; for cleaning of oil products and raktion of coal tar. It turns out electrolysis of water NaCL solution Physical and chemical properties. White opaque very gigroskopich-vy substance. T. plavl. 320 °; t. kip. 1378 °; plotn, 2,13; rastvo, in water of 107 g / 100 (20). Strong basis. On air gradually passes into Na2CO3.
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