tests for metal ions (cations in aqueous solution) Flashcards
1
Q
Iron (Fe²⁺)
A
- green precipitate
- insoluble
2
Q
Iron (Fe³⁺)
A
- red/brown precipitate
- insoluble
3
Q
Zinc (Zn²⁺)
A
- white precipitate
- soluble
4
Q
Calcium (Ca²⁺)
A
- white precipitate
- insoluble
5
Q
Copper (Cu²⁺)
A
- blue precipitate
- insoluble (aqueous sodium hydroxide)
- soluble (aqueous ammonium hydroxide)
- relatively insoluble
6
Q
Ammonium (NH⁴⁺)
A
- no precipitate at any stage
- produces ammonia gas on warming
