R3.2 Redox Reactions
Learning Objectives
3.2.1: Redox reactions: Define redox reactions using the four key criteria: electron transfer, oxygen change, hydrogen change, and oxidation number.
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3.2.2: Balancing Half Reactions: Construct balanced redox half-equations in acidic and basic media using systematic steps.
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3.2.3 & 3.2.4: Redox reactions of metals/halogens & reactivity series: Interpret redox trends using the reactivity series and apply this understanding to predict outcomes of displacement reactions.
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3.2.5 & 3.2.6: Voltaic cell: Describe the construction and operation of a voltaic cell, including electron/ion flow, electrode roles, and function of components.
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3.2.7: Secondary cells: Compare the operation of lithium-ion, lead-acid & fuel secondary cells in terms of redox reactions during discharge and recharge.
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3.2.8: Electrolytic Cell: Explain the functioning of electrolytic cells, including electrode reactions and key advantages.
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3.2.9: Oxidation of organic compounds: Outline the oxidation of primary and secondary alcohols using acidified potassium dichromate, including reaction conditions and products.
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3.2.10: Reduction of organic compounds: Deduce the products formed by the reduction of aldehydes, ketones, and carboxylic acids using lithium aluminium hydride.
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3.2.11: Reduction of Alkenes/Alkynes: Describe the hydrogenation of alkenes and alkynes using a metal catalyst under standard conditions.
Higher Level
3.2.12: Standard Hydrogen Electrode (HL): Define the standard hydrogen electrode and explain its use as a reference for standard electrode potentials.
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3.2.13: Standard Cell Potentials (HL): Calculate the standard cell potential of a voltaic cell using standard reduction potentials.
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3.2.14: Gibbs Energy and Standard Cell Potential (HL): Determine whether a reaction is spontaneous using the relationship between ΔG°, n, F, and E°cell.
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3.2.15: Electrolysis (HL): Predict the products of electrolysis for concentrated and dilute aqueous solutions using E° values and concentration effects.
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3.2.16: Electroplating (HL): Describe the process of electroplating and explain how metal ions are transferred from anode to cathode.