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 electrochemical cells, oxidants are substances that gain electrons during the reaction. Ni(OH) serves as an oxidant during the cell's operation.
Step 2
B. the concentration of OH⁻ ions in the cell increases as the cell discharges.
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Answer
When the cell discharges, chemical reactions occur that produce OH⁻ ions. This leads to an increase in their concentration in the cell as the discharge progresses.
Step 3
C. OH⁻ ions produced at the negative electrode migrate to the positive electrode.
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The negatively charged OH⁻ ions are attracted to the positively charged electrode. Hence, they migrate from the negative electrode towards the positive electrode during the operation of the cell.
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 flow through the external circuit from the positive electrode (anode) to the negative electrode (cathode). This flow is essential for the cell to generate electrical energy.
