In the preparation of an insoluble salt from another insoluble salt b – InterviewSolution

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1.	In the preparation of an insoluble salt from another insoluble salt by precipitation [double decomposition], dilute nitric acid and not dilute sulphuric acid is generally used.Give reason.
Answer» Direct addition of dil. H₂SO₄ to PbCO₃ is an impractical method of preparing lead sulphate since PbSO₄ is insoluble and forms a coating on PbCO₃ , thereby the reaction slowly comes to a stop.

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