1.

State your observations when ammonium hydroxide solution is added drop by drop and then in excess to each of the following solutions : (i) Copper sulphate solution. (ii) Zinc sulphate solution.

Answer»

(i) A pale blue precipitate is formed and the precipitate dissolves when excess of ammonium hydroxide is added, giving clear deep blue solution of tetra amine copper sulphate. 

(ii) White gelatinous precipitate of Zn(OH)2 is formed and the ppt. dissolves in excess of ammonium hydroxide to give a clear transparent solution.



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