A galvanic cell is set up as shown in the diagram below - VCE - SSCE Chemistry - Question 11 - 2018 - Paper 1
Question 11
A galvanic cell is set up as shown in the diagram below.
When this cell is operating
A. a gas forms at the Ag electrode.
B. the mass of the Ag electrode increases.... show full transcript
Worked Solution & Example Answer:A galvanic cell is set up as shown in the diagram below - VCE - SSCE Chemistry - Question 11 - 2018 - Paper 1
Step 1
A. a gas forms at the Ag electrode.
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Answer
In this galvanic cell, a gas does not form at the Ag electrode. Instead, silver ions (Ag+) from the solution are reduced to solid silver (Ag) as the cell operates.
Step 2
B. the mass of the Ag electrode increases.
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Answer
As the galvanic cell operates, Ag+ ions are reduced and deposited as solid silver on the Ag electrode, increasing its mass.
Step 3
C. Ag+ ions move towards the Fe electrode.
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Answer
In a galvanic cell, Ag+ ions move in the solution but migrate toward the Ag electrode where they are reduced, not towards the Fe electrode.
Step 4
D. electrons move from the Ag electrode to the Fe electrode.
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Answer
Electrons flow from the Ag electrode (where oxidation occurs) to the Fe electrode (where reduction occurs). Thus, this statement is correct.
