Chemistry A-Level
Spectator ions
What Spectator ions means in Chemistry A-Level, as defined for OCR.
Definitions of Spectator ions
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Reference: OCR
Ions that appear unchanged on both sides of an ionic equation and are cancelled so that only the species that change appear.
Ions such as Na⁺ and Cl⁻ that are omitted from the ionic equation.
Topics that use Spectator ions
- Acids (OCR A-Level)
- Compounds, formulae and equations (OCR A-Level)
Related terms
- Acid–base titration
- Balanced chemical equations
- charge balance
- Concentration and mass concentration
- Distinction between strength and concentration
- Equivalence point
- indicator choice
- ionic equations
Using Spectator ions in the exam
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