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The following diagram shows two connected electrochemical cells - VCE - SSCE Chemistry - Question 29 - 2021 - Paper 1
Question 29
The following diagram shows two connected electrochemical cells. The following diagram shows two connected electrochemical cells: - Zn - salt bridge - Cu - Ni Wh... show full transcript
Worked Solution & Example Answer:The following diagram shows two connected electrochemical cells - VCE - SSCE Chemistry - Question 29 - 2021 - Paper 1
Step 1
Cell 1
Answer
In Cell 1, a chemical transformation occurs where zinc (Zn) is oxidized, releasing electrons. This chemical reaction converts chemical energy to electrical energy, leading to the generation of an electric current. Therefore, the transformation for Cell 1 is:
chemical → electrical.
Step 2
Cell 2
Answer
In Cell 2, copper ions (Cu²⁺) are reduced as they gain electrons from the flow generated by Cell 1. This process effectively converts electrical energy back into chemical energy as the ions are deposited as solid copper. Hence, the transformation for Cell 2 is:
electrical → chemical.