Question

Solution of carbonates produces a brownish red precipitate with solution of ………​

Answer 1

Answer:

Acidify the test solution with acetic acid. Then add a few drops of 0.1 M potassium hexacyanoferrate(II) solution (K4Fe(CN)6). A red-brown precipitate confirms the presence of Cu2+.

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Reaction with ammonia.

Acid Solution Cu2+(aq)

Basic Solution Cu(OH)2(s)

Solution with Excess NH3 Cu(NH3)42+(aq)

Color of Complex blue