plumiThe hydrogen-oxygen fuel cell: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 16.3.2 The hydrogen-oxygen fuel cell, 2019–2025, with mark schemes and examiner’s reports where available.
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All 11 questions on The hydrogen-oxygen fuel cell, as a list
- June 2025, Unit 5, Q3 (1 mark): Which reaction occurs at an electrode in a hydrogen-oxygen fuel cell? A O2(g) + 2H2(g) → 2H2O(l) − → 4OH −(aq) B O2(g) + 2H2O(l) + 4e +(aq) + 4OH −(aq) → 4H2O(l
- June 2025 (A), Unit 5, Q2(a) (1 mark): What is the overall cell reaction? (1) A H2(g) + 6OH–(aq) → 4H2O(l) + O2(g) B H2(g) + 6OH–(aq) → 4H2O(l) + O2(g) + 6e– C 2H2(g) + O2(g) → 2H2O(l) D 2H2O(l) → 2H
- June 2025 (A), Unit 5, Q2(b) (1 mark): What is the standard emf, Ed cell , of this fuel cell? (1) A +2.06 V B +1.23 V C +0.43 V D –0.43 V Use this space for any rough working. Anything you write in t
- January 2024, Unit 5, Q2(a) (1 mark): The equation for the overall cell reaction is (1) A 3H2O(l) + ½O2(g) → H2(g) + 4OH–(aq) B H2(g) + 4OH–(aq) → 3H2O(l) + ½O2(g) C H2(g) + ½O2(g) → H2O(l) D H2O(l)
- January 2024, Unit 5, Q2(b) (1 mark): Calculate Ecell for the reaction occurring in the hydrogen‑oxygen fuel cell, under alkaline conditions. (1) A –1.23 V B –0.43 V C +0.43 V D +1.23 V Use this spa
- October 2023, Unit 5, Q9 (1 mark): The half-equation for the reaction taking place at the positive electrode in an alkaline hydrogen-oxygen fuel cell is O2 + 2H2O + 4e− → 4OH− What is the half-eq
- June 2023, Unit 5, Q5 (1 mark): Which reaction occurs at the negative electrode in a hydrogen-oxygen fuel cell? A H2 + 2OH– → 2H2O + 2e– B 2H+ + 2e– → H2 C O2 + 4H+ + 4e– → 2H2O D 4OH– → O2 +
- June 2022, Unit 5, Q2(a) (1 mark): What is the half-equation at the negative electrode? (1) A H2(g) + 2OH−(aq) → 2H2O(l) + 2e− B 2H2O(l) + 2e− → H2(g) + 2OH−(aq) C O2(g) + 2H2O(l) + 4e− → 4OH−(aq
- June 2022, Unit 5, Q2(b) (1 mark): Which statement is correct for an alkaline hydrogen-oxygen fuel cell when compared with an acidic hydrogen-oxygen fuel cell? (1) A Ecell is greater B ΔStotal is
- January 2022, Unit 5, Q2(a) (1 mark): The electrolyte in the fuel cell is acidic. What is the half‑equation at the anode? (1) A ½O2(g) + 2H+(aq) + 2e− → H2O(l) B H2O(l) → ½O2(g) + 2H+(aq) + 2e− C H2
- January 2021, Unit 5, Q4 (1 mark): Hydrogen-oxygen fuel cells can operate in acidic or alkaline conditions. What is the reaction at the anode in an alkaline hydrogen-oxygen fuel cell? A O2(g) + 2
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