Why is Freshly Prepared Ferrous Sulphate Solution Used for Testing the Nitrate Radical in the Brown Ring Test? - Chemistry
why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
A freshly prepared ferrous sulphate solution is used because on exposure to the atmosphere, it is oxidized to ferric sulphate which will not give the brown ring.
Concept: Laboratory Preparation of Nitric Acid
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