Answer:
Ammonia and ammonium acetate
Potassium nitrite and nitrous acid
Explanation:
A buffer system must be formed of:
- A weak base and its conjugate acid, or
- A weak acid and its conjugate base.
Which of the following mixtures can be a buffer?
- Ammonia and ammonium acetate. YES. Ammonia is a weak base and ammonium is its conjugate acid.
- Potassium nitrate and nitric acid. NO. Nitric acid is a strong acid.
- Potassium nitrite and nitrous acid. YES. Nitrous acid is a weak acid and nitrite is its conjugate base.
- Sodium chloride and hypochlorous acid. NO. Hypochlorous acid is a weak acid but its conjugate base is missing.
