To determine the presence of anion and cation in the given salt
| Experiment | Observation | Inference |
|---|---|---|
| Salt Solution + Universal Indicator | Solution turns blue or purple | OH⁻ may be present |
| Confirmatory Test | ||
| Phenolphthalein Test Salt Solution + Phenolphthalein indicator | Solution turns pink | Presence of OH⁻ anion is confirmed |
| Experiment | Observation | Inference |
|---|---|---|
| Salt solution + NaOH solution | Reddish-brown precipitate | Fe³⁺ may be present |
| Confirmatory Test | ||
| Potassium Ferrocyanide Test Salt solution + K₄[Fe(CN)₆] solution | Dark blue precipitate (Prussian blue) | Presence of Fe³⁺ is confirmed |
The given salt contains Fe³⁺ ions as cation and OH⁻ ions as anion. The salt is Fe³⁺OH⁻.