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 a galvanic cell, the Ag electrode serves as the cathode where reduction occurs. Since no gaseous product is formed at this electrode in the given cell setup, this statement is false.
Step 2
B. the mass of the Ag electrode increases.
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Answer
At the cathode, silver ions (Ag extsuperscript{+}) from the solution gain electrons and are deposited as solid silver. Therefore, the mass of the Ag electrode does increase, making this statement true.
Step 3
C. Ag extsuperscript{+} ions move towards the Fe electrode.
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Answer
In a galvanic cell, Ag extsuperscript{+} ions remain in the solution and do not move towards the Fe electrode. Instead, they are reduced at the Ag electrode. Thus, this statement is false.
Step 4
D. electrons move from the Ag electrode to the Fe electrode.
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Answer
Electrons flow from the anode (Fe electrode) to the cathode (Ag electrode) in a galvanic cell. Therefore, this statement is also false, as the flow is in the opposite direction.
