| Question | Answer |
| \[[Cu(H_2O)_6]^{2+}\] | Blue solution |
| \[[Cu(NH_3)_4(H_2O)]^{2+}\] | Dark blue solution |
| \[[CuCl_4]^{2-}\] | Yellow Solution |
| \[[Cu(H_2O)_4(OH)_2]\] | Blue precipitate |
| \[[Fe(H_2O)]^{2+}\] | Green solution |
| \[[Fe(H_2O)_4(OH)_2]\] | Green precipitate |
| \[[Fe(H_2O)_6]^{3+}\] | Yellow solution |
| \[[Fe(H_2O)_3(OH)_3]\] | Orange precipitate |
| \[[Mn(H_2O)]^{2+}\] | Pink solution |
| \[[Mn(H_2O)_4(OH)_2]\] | Brown precipitate |
| \[[Cr(H_2O)_6]^{3+}\] | Green solution |
| \[[Cr(H_2O)_4(OH)_2]\] | Green precipitate |
| \[[Cr(OH)_6]^{3-}\] | Green solution |
| \[[Cr(NH_3)_6]^{3+}\] | Purple solution |
| \[Cu(OH)_2\] | Blue precipitate |
| \[Fe(OH)_2\] | Green precipitate |
| \[Fe(OH)_3\] | Red / brown precipitate |
| \[Mn(OH)_2\] | Cream precipitate |
| \[Cr(OH)_3\] | Grey pecipitiate |
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