To determine the presence of anion and cation in the given salt
| Experiment | Observation | Inference |
|---|---|---|
| Confirmatory Test | ||
| Ammonium Molybdate Test Acidify with conc. HNO₃ and add ammonium molybdate solution, boil | Canary yellow precipitate is formed | PO₄³⁻ is confirmed |
| Experiment | Observation | Inference |
|---|---|---|
| Original solution + H₂S gas in presence of NH₄OH | Black or flesh-coloured precipitate is formed | Group IV cation may be present |
| Confirmatory Test | ||
| Sodium Hydroxide Test Dissolve the precipitate in dilute HCl by boiling and add NaOH in excess | White precipitate forms first, then turns brown on standing | Presence of Mn²⁺ is confirmed |
The given salt contains Mn²⁺ ions as cation and PO₄³⁻ ions as anion. The salt is (Mn)₃(PO₄)₂.