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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-AC-EP-0021 markL1 FoundationCalculatorMeasuring E⦵

The standard hydrogen electrode uses

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0012 marksL2 StandardCalculatorCell EMF

Calculate E⦵cell for a cell made from Ag⁺/Ag (+0.80 V) and Cu²⁺/Cu (+0.34 V).

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0031 markL2 StandardCalculatorCell EMF

Which is the strongest oxidising agent? Cl₂/Cl⁻ +1.36; Br₂/Br⁻ +1.09; I₂/I⁻ +0.54; Fe³⁺/Fe²⁺ +0.77 V.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0041 markL2 StandardCalculatorCell EMF

Using the values above, which reaction is feasible?

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0051 markL2 StandardCalculatorMeasuring E⦵

The salt bridge

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0061 markL2 StandardCalculatorMeasuring E⦵

For the Fe³⁺/Fe²⁺ half-cell, the electrode is

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0091 markL2 StandardCalculatorCell EMF

In the Zn/Cu cell, electrons flow in the external circuit

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0101 markL2 StandardCalculatorConcentration and cells

A hydrogen–oxygen fuel cell produces

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0121 markL2 StandardCalculatorConcentration and cells

Decreasing [Cu²⁺] in a Cu²⁺/Cu half-cell makes its electrode potential

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0072 marksL3 ExamCalculatorConcentration and cells

Calculate E for Zn²⁺/Zn (E⦵ = −0.76 V) when [Zn²⁺] = 0.0010 mol dm⁻³. Use

E=E^\circ+\frac{0.059}{2}\log[\mathrm{Zn^{2+}}]

.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0082 marksL3 ExamCalculatorConcentration and cells

Calculate ΔG⦵ (kJ mol⁻¹) for the Zn/Cu cell:

n=2

, E⦵cell = 1.10 V, F = 96 500 C mol⁻¹.

Salam Academy Original Practice · Proposed mark scheme

SA-AC-EP-0111 markL3 ExamCalculatorCell EMF

E⦵cell is positive but no reaction is seen. A possible reason is

Salam Academy Original Practice · Proposed mark scheme