plumiThe electrochemical series and disproportionation: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 16.1.5 The electrochemical series and disproportionation, 2019–2025, with mark schemes and examiner’s reports where available.
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Q14(a)(i)
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Open the full PDFYour answerQ18(a)(i)
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All 13 questions on The electrochemical series and disproportionation, as a list
- June 2024, Unit 5, Q14(a)(i) (1 mark): Name the type of the forward reaction that is shown in the right‑hand electrode systems in the Data Booklet. (1)
- June 2024, Unit 5, Q14(a)(ii) (1 mark): Name the series formed when the right‑hand electrode systems are placed in order, most negative first. (1)
- January 2024, Unit 5, Q4 (1 mark): Which sequence shows the ions in order of increasing strength as a reducing agent? Refer to your Data Booklet. A V2+ < Fe2+ < Cr2+ B Cr2+ < Fe2+ < V2+ C Cr2+ <
- January 2024, Unit 5, Q16(a)(ii) (2 marks): Write an equation for the reaction of H3MnO4 in acidic solution to give ions containing manganese(VI) and manganese(IV). Use the Latimer diagram to obtain the f
- January 2024, Unit 5, Q16(a)(iii) (2 marks): Deduce whether or not this disproportionation reaction is thermodynamically feasible by calculating E for the reaction. (2)
- October 2023, Unit 5, Q8 (1 mark): Standard electrode potentials can also be given an alternative name. The electrochemical series lists standard electrode potentials in order. Which of these is
- June 2023, Unit 5, Q2 (1 mark): Some standard electrode potentials are shown. Right-hand electrode system E / V Mg2+ + 2e– Mg –2.37 –2.33 Ce3+ + 3e– Ce Mn2+ + 2e– Mn –1.19 Mn3+ + e– Mn
- January 2023, Unit 5, Q20(c) (1 mark): Potassium manganate(VI), K2MnO4 , is a green solid. In acidic solution, the manganate(VI) ions disproportionate to form manganate(VII) ions and manganese(IV) ox
- October 2021, Unit 5, Q3 (1 mark): Some standard electrode potentials are shown. Electrode system E d / V Bk3+ + e– Bk2+ –2.80 Cu2+ + e– Cu+ +0.15 +1.67 Bk4+ + e– Bk3+ Au+ + e– +1.69 Au A
- June 2021, Unit 5, Q18(a)(i) (2 marks): Write the ionic equation for the disproportionation of manganate(VI) ions, MnO4 2−, in acidic conditions, using relevant half-equations from the table. State sy
- June 2021, Unit 5, Q18(a)(ii) (2 marks): Calculate O conditions, stating whether or not the reaction is thermodynamically feasible. (2)
- January 2021, Unit 5, Q19(c)(i) (1 mark): Write the ionic equation for this disproportionation reaction. State symbols are not required. (1)
- January 2021, Unit 5, Q19(c)(ii) (2 marks): Show that the reaction in (c)(i) is thermodynamically feasible. Use the standard electrode potentials of the relevant half-cells from the Data Booklet. (2)
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