3.1.11 Electrode potentials + electrochemical cells (A-level only)

3.1.11 Electrode potentials + electrochemical cells (A-level only)

9th - 12th Grade

8 Qs

quiz-placeholder

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3.1.11 Electrode potentials + electrochemical cells (A-level only)

3.1.11 Electrode potentials + electrochemical cells (A-level only)

Assessment

Quiz

Chemistry

9th - 12th Grade

Hard

Created by

Stanton Wertjes

Used 59+ times

FREE Resource

8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

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

Media Image

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

Media Image

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

Media Image

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

Media Image

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

Media Image

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

Media Image

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)