Reactions of Sodium Tungstate Preparation

Sodium tungstate is the inorganic compound with the formula Na2WO4. This white, water-soluble solid is the sodium salt of tungstic acid. It is useful as a source of tungsten for chemical synthesis. It is an intermediate in the conversion of tungsten ores to the metal.

Treatment of sodium tungstate with hydrochloric acid gives the trioxide:

    Na₂WO₄ + 2 HCl → WO₃ + 2 NaCl + H₂O

This reaction can be reversed using aqueous solution of sodium hydroxide

 

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