Explain how the structure and chemistry of ONE of the following cells determines its cost and practicality - HSC - SSCE Chemistry - Question 23 - 2015 - Paper 1
Question 23
Explain how the structure and chemistry of ONE of the following cells determines its cost and practicality.
- button cell
- fuel cell
- vanadium redox cell
- lithiu... show full transcript
Worked Solution & Example Answer:Explain how the structure and chemistry of ONE of the following cells determines its cost and practicality - HSC - SSCE Chemistry - Question 23 - 2015 - Paper 1
Step 1
Name of cell: Silver Button Cell
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Answer
The silver button cell utilizes zinc as the anode and silver oxide as the cathode. Its design is compact and lightweight, which significantly contributes to its applicability in portable electronics.
Step 2
Explain the structure of the cell.
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Answer
The structure features a powdered zinc anode, a composite carbon/silver oxide cathode, and an alkaline electrolyte paste. This design allows efficient electron transfer and minimizes corrosion.
Step 3
Discuss the chemistry of the cell.
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Answer
The electrochemical reactions involve zinc oxidizing and releasing electrons at the anode, while silver oxide is reduced at the cathode. The overall cell reaction generates a stable and consistent voltage.
Step 4
Link to cost and practicality.
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Answer
Although silver is costly, the button cell's compact design and efficient performance make it affordable and practical for small electronic devices, thereby balancing the high material cost with its usefulness in the market.
