What Are The Methods Of Synthesis For Sodium Tungstate?

There are several methods for synthesizing sodium tungstate, including:

1. Reaction of tungsten oxide with sodium hydroxide: Tungsten oxide is dissolved in a solution of sodium hydroxide and heated to form sodium tungstate.

2. Reaction of tungstic acid with sodium hydroxide: Tungstic acid is added to a solution of sodium hydroxide and heated to form sodium tungstate.

3. Double decomposition reaction: Sodium tungstate can be synthesized by mixing solutions of sodium carbonate and tungstic acid or sodium tungstate and a soluble salt containing tungsten, such as ammonium metatungstate.

4. Reduction of tungsten trioxide: Tungsten trioxide is mixed with sodium borohydride and heated to produce sodium tungstate.

5. Electrolysis: Sodium tungstate can also be produced through the electrolysis of molten sodium tungstate or a mixture of tungsten oxide and sodium hydroxide using an inert electrode.

The choice of synthesis method may depend on factors such as cost, purity requirements, and desired yield.