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A common tungstic acid, referred to as tungstic acid, is a light orange-yellow powder; the composition varies slightly with the preparation conditions. When the composition is WO3·H2O, the density is 5.5g/cm3, and it is dehydrated at 100 °C; insoluble in water, After immersion, it gradually gelled and dissolved in ammonia water, alkaline solution and concentrated hydrochloric acid. Yellow tungstic acid is burned and dehydrated to form tungsten trioxide WO3, which is a bright light yellow crystal or powder with a density of 7.16g/cm3 and a melting point of 1473℃. Yellow tungstic acid is acidified by adding hydrochloric acid to sodium tungstate Na2WO4·2H2O solution to become sodium polytungstate solution, and then adding excess concentrated hydrochloric acid to the hot solution. The yellow tungstic acid prepared by this method contains sodium impurities, and the ion exchange method and solvent extraction method are now used instead. Company Profile Jiangsu Leiji Metal Mater…

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