Analytical Chemistry: Uses of Ammonium Hydroxide and Sodium Hydroxide
Analytical Chemistry
In the qualitative analysis of compounds, their colour helps in their identification. The table given below shows some examples of colourless and coloured ions.
| Colourless | Coloured | |||
| Cation | Symbol | Cation | Symbol | Colour |
| Ammonium | Cupric | Cu2+ | Blue | |
| Sodium | Na+ | Ferrous | Fe2+ | Light green |
| Potassium | K+ | Ferric | Fe3+ | Yellowish-brown |
| Calcium | Ca+ | Nickel | Ni2+ | Green |
| Magnesium | Mg2+ | Chromium | Cr3+ | Green |
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