Test with Carbonate Ions
- All ions, except sodium ions and ammonium ions will form precipitate with carbonate.
- This is because sodium carbonate and ammonium carbonate are soluble in water.
Na2CO3 | |
Na+ | – |
Ca2+ | White precipitate. |
Mg2+ | White precipitate. |
Al3+ | White precipitate. |
Zn2+ | White precipitate. |
Pb2+ | White precipitate. |
Fe2+ | Green precipitate. |
Fe3+ | Brown precipitate. |
Cu2+ | Blue precipitate. |
NH4+ | – |