Identification of Anions
| Test with red litmus | Add HNO3 and Ba(NO3)2 | Add dilute HNO3 and AgNO3 to fresh sample | Add Al and NaOH to fresh sample; warm | |
| –
CO3 |
Litmus turns blue | – | CO2 released (HNO3 only) | – |
| 2-
SO4 |
No change | Precipitate forms | – | – |
| Cl- | No change | No precipitate | White precipitate | – |
| I- | No change | No precipitate | Yellow precipitate | – |
| –
NO3 |
No change | No precipitate | No precipitate | NH3 produced |