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12.31. Why is it necessary to use acetic acid and not sulphuric acid for acidification of sodium extract for testing sulphur by lead acetate test?

0 1 View | Posted 6 months ago
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    Answered by

    Vishal Baghel | Contributor-Level 10

    6 months ago

    It necessary to use acetic acid and not sulphuric acid for acidification of sodium extract for testing sulphur by lead acetate test because sulphuric acid will react with lead acetate to form a white precipitate of lead sulphate which will interfere in the test of sulphur.

    Pb (OCOCH3)2 + H2SO4 →PbSO4  + 2CH3COOH

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