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On adding NaOH to ammonium sulphate, a colourless gas with pungent odour is evolved which forms a blue coloured complex with Cu^(2+) ion. Identify the gas. |
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Answer» Solution :Ammonium sulphate reacts with NaOH to evolve `NH_(3)` gas which has pungent smell and forms blue coloured complex with `Cu^(2+)` ions as shown below : `{:(UNDERSET("Amm. sulphate")((NH_(4))_(2)SO_(4)) + 2 NaOH RARR underset("Ammonia")(2NH_(3))uarr + Na_(2)SO_(4) + 2H_(2)O),(underset("Copper (II) ion")(Cu^(2+)(AQ.))+4NH_(3)(aq.) rarr underset(("Blue coloured complex"))underset("Tetraamminecopper (II) ion")([Cu(NH_(3))_(4)]^(2+)(aq.))):}` |
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