In this cell
A - VCE - SSCE Chemistry - Question 17 - 2012 - Paper 1
Question 17
In this cell
A. Ag⁺(aq) is reduced and the Zn(s) is oxidised.
B. Ag(g) is oxidised and the Zn²⁺(aq) is reduced.
C. Ag(s) is reduced and the Zn²⁺(aq) is oxidised.
D.... show full transcript
Worked Solution & Example Answer:In this cell
A - VCE - SSCE Chemistry - Question 17 - 2012 - Paper 1
Step 1
A. Ag⁺(aq) is reduced and the Zn(s) is oxidised.
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Answer
In this electrochemical cell, the half-reaction involving silver ions (Ag+) is a reduction process where silver ions gain electrons to form solid silver (Ag). On the other hand, the zinc metal (Zn) is oxidised, losing electrons and forming zinc ions (Zn2+). Therefore, this statement is correct.
Step 2
B. Ag(g) is oxidised and the Zn²⁺(aq) is reduced.
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Answer
This statement is incorrect because silver ions in solution (Ag+) are being reduced, not metallic silver (Ag). Moreover, zinc ions (Zn2+) are not being reduced in this cell.
Step 3
C. Ag(s) is reduced and the Zn²⁺(aq) is oxidised.
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Answer
In the cell, the solid silver (Ag) is not participating as a reactant for reduction, thereby making this statement incorrect. The zinc ions are oxidised instead.
Step 4
D. Ag⁺(aq) is oxidised and the Zn(s) is reduced.
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Answer
This statement is also incorrect because silver ions (Ag+) are being reduced, rather than oxidised, and zinc (Zn) is oxidised, not reduced.
