When a mixture of NO (nitric oxide) and NO2 (nitrogen dioxide) is passed through an aqueous solution of ammonium sulphate (NH4)2SO4, several chemical reactions occur. Let's explore the process in detail:

1. Dissociation of ammonium sulphate:
- (NH4)2SO4 → 2NH4+ + SO42-

2. Reaction of nitrogen oxides with water:
- NO + H2O → HNO2
- NO2 + H2O → HNO3

3. Formation of nitrous acid:
- HNO2 + H2O ⇌ H3O+ + NO2-

4. Formation of nitric acid:
- HNO3 + H2O ⇌ H3O+ + NO3-

Key Points:
- The reaction between NO and H2O forms nitrous acid (HNO2), while the reaction between NO2 and H2O forms nitric acid (HNO3).
- The nitrous acid and nitric acid formed are weak acids and can undergo dissociation in water.

5. Acid-base reactions:
- NH4+ + H2O ⇌ NH3 + H3O+
- SO42- + H2O ⇌ HSO4- + OH-

Key Points:
- Ammonium ion (NH4+) reacts with water to form ammonia (NH3) and hydronium ion (H3O+).
- Sulphate ion (SO42-) reacts with water to form hydrogen sulphate ion (HSO4-) and hydroxide ion (OH-).

6. Neutralization reactions:
- H3O+ + OH- → 2H2O
- H3O+ + NO2- → HNO2 + H2O
- H3O+ + NO3- → HNO3 + H2O

Key Points:
- The hydronium ion (H3O+) reacts with the hydroxide ion (OH-) to form water.
- The hydronium ion (H3O+) reacts with the nitrite ion (NO2-) to form nitrous acid (HNO2) and water.
- The hydronium ion (H3O+) reacts with the nitrate ion (NO3-) to form nitric acid (HNO3) and water.

7. Overall reaction:
- NO + NO2 + 2H2O + (NH4)2SO4 → 2HNO2 + HNO3 + 2NH3 + 2H2O + (NH4)2SO4
- NO + NO2 + (NH4)2SO4 → 2HNO2 + HNO3 + 2NH3 + (NH4)2SO4

Key Points:
- The overall reaction involves the formation of nitrous acid (HNO2), nitric acid (HNO3), ammonia (NH3), and the unchanged ammonium sulphate ((NH4)2SO4).

In summary, when a mixture of NO and NO2 is passed through an aqueous solution of ammonium sulphate, it results in the formation of nitrous acid, nitric acid, and ammonia. The reaction involves the dissociation of ammonium sulphate, reactions between nitrogen oxides and water, acid