plumiStandard electrode potentials: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 5.2.3.3 Standard electrode potentials, 2016–2025, with mark schemes and examiner’s reports where available.
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Q20(a)(i)
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All 8 questions on Standard electrode potentials, as a list
- June 2025, Paper 1, Q20(a)(i) (4 marks): A student sets up a standard cell based on redox systems 2 and 4. Draw a labelled diagram to show how this cell could be set up to measure its standard cell pot
- June 2024, Paper 1, Q21(c) (4 marks): Standard electrode potentials are measured by comparison with a reference half-cell. Draw a labelled diagram to show how the standard electrode potential could
- June 2022, Paper 1, Q13 (1 mark): Standard electrode potentials for two redox systems are shown below. Cr3+(aq) + 3e– Cr(s) –0.74 V Cr3+(aq) + e– Cr2+(aq) –0.42 V What is the standard electrode
- November 2021, Paper 1, Q19(a)(i) (3 marks): Draw a labelled diagram to show how this cell could be set up in the laboratory. [3]
- November 2020, Paper 1, Q19(a) (3 marks): A student sets up a standard cell in the laboratory based on redox systems 3 and 4. Draw a labelled diagram to show how this cell could be set up to measure its
- June 2018, Paper 1, Q21(b)(i) (4 marks): Draw a labelled diagram to show how this cell could be set up to measure its standard cell potential. Include details of apparatus, solutions and the standard c
- June 2017, Paper 1, Q22(a)(i) (4 marks): Draw a labelled diagram to show how this cell could be set up to measure its standard cell potential. Include details of the apparatus, solutions and the standa
- June 2017, Paper 1, Q22(b) (2 marks): In Table 22.1, what is the strongest reducing agent and the strongest oxidising agent? Strongest reducing agent Strongest oxidising agent [2]
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