Activity 1B (Textbook) – Chemistry Form 5 Chapter 1 (Redox Equilibrium)

Activity 1B:
Carry out this activity in pairs.
The following reaction is a redox reaction:

2NH₃(g) + 3CuO(s) → N₂(g) + 3Cu(s) + 3H2O(l)

(a) Identify:
(i) Oxidised substance.
(ii) Reduced substance.
(iii) Oxidising agent.
(iv) Reducing agent.

(b) Explain your answers to your classmates.

Answer:
(a)(i) Ammonia

(ii) Copper(II) oxide

(iii) Copper(II) oxide

(iv) Ammonia

(b)
– Ammonia is oxidised because it loses hydrogen

– Copper(II) oxide is reduced because it loses oxygen.

– Copper(II) oxide is an oxidising agent because it causes ammonia to undergo oxidation reaction.

– Ammonia is a reducing agent because it causes copper(II) oxide to undergo reduction reaction.