[O-:1][Mo:2]([O-:5])(=[O:4])=[O:3].[Na+:6].[Na+].[Mo]=[O:9]>[OH-].[Na+]>[OH2:1].[OH2:9].[O-:4][Mo:2]([O-:5])(=[O:3])=[O:1].[Na+:6].[Na+:6]Solid Sodium Molybdate (Na2MoO4) may be prepared by dissolving MoO3 in a basic aqueous solution of sodium hydroxide (NaOH) and crystallizing the filtered product to yield sodium molybdate dihydrate (Na2MoO4.2H2O). The anhydrous salt may be prepared by heating to a sufficient temperature to liberate the water.
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