Redox chemistry
Identify G3 Science Chemistry oxidation and reduction using oxygen, hydrogen, electrons and oxidation states, then interpret tests for redox agents.
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Before you begin
Identify G3 Science Chemistry oxidation and reduction using oxygen, hydrogen, electrons and oxidation states, then interpret tests for redox agents.
Learning goals
- Define oxidation and reduction as gain or loss of oxygen or hydrogen
- Define redox as electron transfer and changes in oxidation state
- Describe how aqueous potassium iodide and acidified potassium manganate(VII) test for oxidising and reducing agents by their colour changes
Syllabus statements covered
- define oxidation and reduction (redox) in terms of oxygen/hydrogen gain/loss
- define redox in terms of electron transfer and changes in oxidation state
- describe the use of aqueous potassium iodide and acidified potassium manganate(VII) in testing for oxidising and reducing agents from the resulting colour changes.
Lessons
Work through them in order.
- Oxidation, reduction and electron transferIdentify what is oxidised and reduced from oxygen, hydrogen or electron transfer, and name the oxidising and reducing agents.
- Oxidation states and identifying redoxAssign oxidation states and use their changes to decide whether a reaction is redox.
- Oxidising and reducing agents: reagent evidenceUse the colour changes of aqueous potassium iodide and acidified potassium manganate(VII) to show whether a substance is an oxidising or reducing agent.
Practise and check
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