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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U”) RED ZONE [RZ]

(b) Diagram 7.1 shows a simple voltaic cell.
Rajah 7.1 menunjukkan suatu sel voltan ringkas.

Copper Zinc
Kuprum Zink

Copper(II) nitrate Zinc nitrate
Kuprum(II) nitrat
Zink nitrat

Diagram 7.1 / Rajah 7.1

(i) Based on Diagram 7.1, explain the reactions at anode and cathode. Your answers
should include the following.
 electrode that acts as anode and cathode
 half equation for each electrode
 observation for each electrode
 substance that is reduced and oxidised
 oxidising agent and reducing agent
 overall equation for the redox reaction

Berdasarkan kepada Rajah 7.1, terangkan tindak balas pada anod dan katod.
Jawapan anda mestilah mengandungi yang berikut:
 elektrod yang bertindak sebagai anod dan katod
 setengah persamaan bagi setiap elektrod
 pemerhatian bagi setiap elektrod
 bahan yang dioksidakan dan bahan yang diturunkan
 agen pengoksidaan dan agen penurunan
 persamaan keseluruhan bagi tindak balas redoks tersebut
[11M]

(ii) State two differences between voltaic cell and electrolytic cell.
Nyatakan dua perbezaan antara sel voltan dan sel elektrolisis.

[2M]
8 (a) Ammonia is manufactured in industry through Haber Process. Describe briefly
about Haber Process.
Ammonia dihasilkan dalam industri melalui Proses Haber. Terangkan secara
ringkas mengenai Proses Haber.
[4M]

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