To determine the presence of anion and cation in the given salt
| Experiment | Observation | Inference |
|---|---|---|
| Salt + dilute H₂SO₄ | No reaction | Dilute H₂SO₄ group is absent |
| Salt + Conc H₂SO₄ | Evolution of colorless gas | C₂O₄²⁻ may be present |
| Confirmatory Test | ||
| KMnO₄ Test Salt + Conc H₂SO₄ + KMnO₄ solution | KMnO₄ decolorizes | Presence of C₂O₄²⁻ anion is confirmed |
| Experiment | Observation | Inference |
|---|---|---|
| Salt solution + NaOH solution | Blue precipitate | Cu²⁺ may be present |
| Confirmatory Test | ||
| Potassium Ferrocyanide Test Salt solution + K₄[Fe(CN)₆] solution | Chocolate brown precipitate | Presence of Cu²⁺ is confirmed |
The given salt contains Cu²⁺ ions as cation and C₂O₄²⁻ ions as anion. The salt is Cu²⁺C₂O₄²⁻.