To determine the presence of anion and cation in the given salt
| Experiment | Observation | Inference |
|---|---|---|
| Take the salt and treat with concentrated H₂SO₄ | Colourless gas evolves and it etches glass | F⁻ may be present |
| Confirmatory Test | ||
| Calcium Chloride Test Treat salt solution with calcium chloride solution | White gelatinous precipitate forms | Presence of F⁻ is confirmed |
| Experiment | Observation | Inference |
|---|---|---|
| Flame test in a clean non-luminous flame | Lilac flame | K⁺ may be present |
| Confirmatory Test | ||
| Sodium Cobaltinitrite Test Salt solution + sodium cobaltinitrite reagent | Yellow precipitate | K⁺ is confirmed |
The given salt contains K⁺ ions as cation and F⁻ ions as anion. The salt is KF.