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6.4 Redox

Syllabus
0620–2026–2027
Topic
6.4
Level
—

6.4.1—Roman numeral to indicate the

  • Use a Roman numeral to indicate the oxidation number of an element in a compound

6.4.2—Redox reactions as involving

  • Define redox reactions as involving simultaneous oxidation and reduction

6.4.3—Oxidation as gain of oxygen and

  • Define oxidation as gain of oxygen and reduction as loss of oxygen

6.4.4—Redox reactions as reactions involving

  • Identify redox reactions as reactions involving gain and loss of oxygen

6.4.5—Oxidation and reduction in redox

  • Identify oxidation and reduction in redox reactions

6.4.6—Oxidation in terms of: (a) loss of

  • Define oxidation in terms of: (a) loss of electrons (b) an increase in oxidation number

6.4.7—Reduction in terms of: (a) gain of

  • Define reduction in terms of: (a) gain of electrons (b) a decrease in oxidation number

6.4.8—Redox reactions as reactions involving

  • Identify redox reactions as reactions involving gain and loss of electrons

6.4.9—Redox using oxidation numbers: (a)

  • Identify redox using oxidation numbers: (a) uncombined elements are 0 (b) monatomic ion number equals ion charge (c) compound total is 0 (d) ion total equals ion charge

6.4.10—Redox reactions by the colour changes

  • Identify redox reactions by the colour changes involved when using acidified aqueous potassium manganate(VII) or aqueous potassium iodide

6.4.11—An oxidising agent as a substance that

  • Define an oxidising agent as a substance that oxidises another substance and is itself reduced

6.4.12—Reducing agent as a substance that

  • Define a reducing agent as a substance that reduces another substance and is itself oxidised

6.4.13—Oxidising agents and reducing agents

  • Identify oxidising agents and reducing agents in redox reactions

Objective notes

13 learning objectives
ConceptIGCSE Chemistry