Which ion cannot catalyse the reaction between iodide (I–) and peroxodisulfate (S2O82–)?
Use the data in the table to help you answer this question.
3.1.11 Electrode potentials + electrochemical cells (A-level only)
Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
Stanton Wertjes
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which ion cannot catalyse the reaction between iodide (I–) and peroxodisulfate (S2O82–)?
Use the data in the table to help you answer this question.
Co2+
Cr2+
Fe2+
Fe3+
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The following cell has an EMF of +0.46 V.
Cu | Cu2+ || Ag+ | Ag
Which statement is correct about the operation of the cell?
Metallic copper is oxidised by Ag+ ions.
The silver electrode has a negative polarity.
The silver electrode gradually dissolves to form Ag+ ions.
Electrons flow from the silver electrode to the copper electrode via an external circuit.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In this question consider the data in the image.
The e.m.f. of the cell Ag(s) | Ag+(aq) || Pb2+(aq) | Pb(s) is
0.93 V
0.67 V
−0.67 V
−0.93 V
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In this question consider the data in the image.
The e.m.f. of the cell Pt(s) | H2(g) | H+(aq) || Ag+(aq) | Ag(s) would be increased by
increasing the concentration of H+(aq).
increasing the surface area of the Pt electrode.
increasing the concentration of Ag+(aq).
decreasing the pressure of H2(g).
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A disproportionation reaction occurs when a species M+ spontaneously undergoes simultaneous oxidation and reduction.
2M+(aq) → M2+(aq) + M(s)
The table contains E⦵ data for copper and mercury species.
Using these data, which one of the following can be predicted?
Both Cu(I) and Hg(I) undergo disproportionation.
Only Cu(I) undergoes disproportionation.
Only Hg(I) undergoes disproportionation.
Neither Cu(I) nor Hg(I) undergoes disproportionation.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Based on the above data, which one of the following could reduce 0.012 mol of bromine to bromide ions?
40 cm3 of a 0.10 mol dm−3 solution of Cr2O72- (aq)
80 cm3 of a 0.30 mol dm−3 solution of Fe3+(aq)
50 cm3 of a 0.24 mol dm−3 solution of V3+(aq)
50 cm3 of a 0.24 mol dm−3 solution of H2SO3(aq)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Use the data in the table to answer this question.
The most powerful oxidising agent in the table is
Mn2+(aq)
Zn(s)
MnO4-(aq)
Zn2+(aq)
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Use the data in the table to answer this question.
Which one of the following statements is not correct?
Fe2+(aq) can reduce acidified MnO4-(aq) to Mn2+(aq)
CrO72-(aq) can oxidise acidified Fe2+(aq) to Fe3+(aq)
Zn(s) can reduce acidified CrO72-(aq) to Cr2+(aq)
Fe2+(aq) can reduce acidified Cr3+(aq) to Cr2+(aq)
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