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| 1. |
CuSO_4 on mixing with NH_3 (1:4 ratio) does not give test for Cu^(2+) ions but gives test for SO_(4)^(2-) ions. Why? |
| Answer» SOLUTION :It is because when `NH_3` COORDINATES to `Cu^(2+)` IONS and it forms the COMPLEX `[Cu(NH_3)_4]SO_4` copper ions are PRESENT in coordination sphere, therefore they are non-ionisable whereas `SO_(4)^(2-)` ions are counter ions which are ionisable. | |