Question

QUALITATIVE ANALYSIS OF AMMONIUM CHLORIDE AND AMMONIUM HYDROXIDE

Answer 1

When ammonium hydroxide is added in excess to copper sulphate a pale blue precipitate changes to azure blue solution which is soluble and forms copper tetrammine.

When a rod dipped in HCl gas is brought near ammonium chloride dense white fumes are observed.

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Answer 2

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Buffer solution usually consists of a weak acid and salt of its conjugate base or of a weak base and a salt of its conjugate acid. Here, we haveNH4OH+NH4Cl which is a basic buffer as NH4OH is a weak base and NH4Cl is a salt of its conjugate acid which is NH4+.

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