Sodium chromate, Na(2)CrO(4) is made com...

Sodium chromate, `Na_(2)CrO_(4)` is made commerically by :

heating mixture of `Cr_(2)O_(3) and Na_(2)CO_(3)`

heating mixture of chromate ore and sodium carbonate in the presence of oxygen

heating sodium dichromate with sodium carbonate

reacting NaOH with chromic acid

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