What happens when H+ is added to ammonium hydroxide and ammonium chloride buffer?
- A. More ammonium hydroxide is formed
- B. Reaction will move reverse
- C. Reaction will move forward
- D. No effect on equilibrium
Explanation
The added hydrogen ions are mopped up by the weak base ammonium hydroxide, which reacts forward to give ammonium ions and water, so the pH barely shifts. This is exactly what buffering means: the reservoir of base neutralises added acid. If alkali were added instead, the ammonium ions from the salt would supply protons to neutralise it.