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Oxidation, reduction and redox equations
This topic connects oxidation-state rules to redox reactions and half equations.
8
Objectives
10
Flashcards
10
Questions
90 min
Study time
AqaA LevelChemistryPhysical chemistry
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Syllabus checklist
What you need to know
8 objective pages available
Oxidation states4 objectives
- Define oxidation as an increase in oxidation state.
- Define reduction as a decrease in oxidation state.
- Assign oxidation states using standard rules.
- Identify oxidising and reducing agents from oxidation-state changes.
Redox equations4 objectives
- Write half equations for oxidation and reduction processes.
- Combine half equations into overall redox equations.
- Balance atoms and charges in redox equations.
- Use redox equations in reactions involving acids, metals and transition-metal ions.
Key terms
OxidationReductionRedox ReactionOxidation StateOxidizing agentReducing agent
Exam tips
- Carefully track oxidation states: Always assign oxidation states to elements in a reaction to identify oxidation and reduction.
- Always define key terms in your answers.: When asked about reduction or oxidation, clearly define these terms before providing examples.
Common mistakes
- Confusing oxidation with reduction: Remember that oxidation is an increase in oxidation state, while reduction is a decrease.
- Confusing oxidation with reduction: Remember that reduction is characterized by a decrease in oxidation state, while oxidation involves an increase.
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