To determine the presence of anion and cation in the given salt
| Experiment | Observation | Inference |
|---|---|---|
| Take 0.1 g salt + dilute H₂SO₄ | Colourless vapours with vinegar-like smell evolve | CH₃COO⁻ may be present |
| Confirmatory Tests | ||
| Ester Test Take 0.1 g salt in a test tube with ethanol and a little conc. H₂SO₄, then heat | Fruity odour of ethyl acetate is developed | CH₃COO⁻ is confirmed |
| Ferric Chloride Test Add neutral ferric chloride solution to the salt solution | Deep red colour appears; on heating it disappears and a brown-red precipitate forms | CH₃COO⁻ is confirmed |
| Experiment | Observation | Inference |
|---|---|---|
| Confirmatory Test | ||
| If group-V is absent, add disodium hydrogen phosphate solution and scratch the inner walls with a glass rod | A white crystalline precipitate of magnesium ammonium phosphate is formed | Mg²⁺ is confirmed |
The given salt contains Mg²⁺ ions as cation and CH₃COO⁻ ions as anion. The salt is Mg(CH₃COO)₂.