Potassium dichromate can be prepared by chromite ores, by first roasting the ores with sodium carbonate in presence of quick lime. Then treating the sodium chromate, which was obtained as a product of the first reaction, with sulphuric acid, in order to get sodium dichromate.
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Answer:
Potassium dichromate can be prepared by chromite ores, by first roasting the ores with sodium carbonate in presence of quick lime. Then treating the sodium chromate, which was obtained as a product of the first reaction, with sulphuric acid, in order to get sodium dichromate.