1.

Give a test for sulphates.

Answer»


Solution :(i) Dilute solution of sulphuric acid/aqueous solution of sulphates gives white precipitate ( barium sulphate) with barium chloridesolution.
(ii) It can ALSO be detected using lead acetate solution. Here a white precipitate of lead sulphate is obtained.
(iii) `BaCl_(2)+H_(2)SO_(4) RARR underset("(White precipitate)")underset("Barium sulphate")(BASO_(4)""darr+2HCl)`
(iv) `(CH_(3)COO)_(2)Pb+H_(2)SO_(4)rarrunderset("(White precipitate)")underset("Lead SUPHATE")(PbSO_(4)""darr+2CH_(3)COOH)`


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