When this cell is generating electricity
A - VCE - SSCE Chemistry - Question 15 - 2007 - Paper 1
Question 15
When this cell is generating electricity
A. Ni(OH) acts as the oxidant.
B. the concentration of OH⁻ ions in the cell increases as the cell discharges.
C. OH⁻ ions pr... show full transcript
Worked Solution & Example Answer:When this cell is generating electricity
A - VCE - SSCE Chemistry - Question 15 - 2007 - Paper 1
Step 1
A. Ni(OH) acts as the oxidant.
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Answer
In this galvanic cell, nickel hydroxide (Ni(OH)₂) is indeed reduced, acting as the oxidant. This is crucial as it accepts electrons during the electrochemical reaction.
Step 2
B. the concentration of OH⁻ ions in the cell increases as the cell discharges.
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Answer
As the cell discharges, the oxidation reaction at the anode produces OH⁻ ions, leading to an increase in their concentration in the cell.
Step 3
C. OH⁻ ions produced at the negative electrode migrate to the positive electrode.
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During discharge, OH⁻ ions generated at the negative electrode (anode) do indeed migrate towards the positive electrode (cathode), aiding in the electrochemical process.
Step 4
D. electrons flow in the external circuit from the positive to the negative electrode.
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Answer
In a galvanic cell, electrons actually flow from the negative electrode to the positive electrode in the external circuit, as the negative electrode donates electrons to the circuit.
