| EXPERIMENT | OBSERVATIONS | INFERENCE |
| 1.PHYSICAL EXAM:- a) Observe the colour of the salt. b) Observe the smell of the salt. | White Ammoniac smell | Cu2+, Mn2+, Co2+, Ni2+, Fe3+ absent. NH4+, may be absent. |
| 2. DILUTE H2SO4TEST:- a) Treated a pinch of the salt with dilute H2SO4. b) Shook a pinch of salt with water taken in a test tube. | Coulourless, odourless, gas evolved with brisk effervescence, turned lime water milky. Salt did not dissolve. | CO32- present Insoluble indicated. |
| 3. CONFIRMATORY TEST FOR CARBONATE:- Tried to dissolve the salt in water. To the salt added dilute HCl. | The salt is insoluble in water. Brisk effervescence with evolution of colourless, odourless gas which turned lime water milky. | Insoluble carbonate indicated. Insoluble carbonate confirmed. |
| 4. Heated a pinch of salt with concentrated NaOH solution. | Ammonia gas evolved. | NH4+ may be present. |
| 5. Confirmatory Test:- a. Bring a glass rod dipped in conc. HCl near the mouth of the test tube b. Bring a filter paper dipped in Nesseler’s reagent near the mouth of the test tube | White dense fumes Filter paper turned reddish brown | NH4+ presence is confirmed NH4+ presence is confirmed |
Result :- Anion:- CO32- Cation:- NH4+
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