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

Why it is necessary to use acetic acid and not sulphuric acid for acid

1.	Why it is necessary to use acetic acid and not sulphuric acid for acidification of sodium extraction for testing sulphur by lead acetate test ?
Answer» For testing sulphur, the sodium extract is acidified with acetic acid because lead acetate is soluble and does not interfere with the test. If `H_(2)SO_(4)` were used, lead acetate itself will react with `H_(2)SO_(4)` to form white ppt. of lead sulphate which will interfere with the test. `underset("Lead acetate")(Pb(OCOCH_(3))_(2) )+H_(2)SO_(4) rarr underset("(White ppt.)")(PbSO_(4)darr) + 2CH_(3)COOH`

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

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