Equivalence point
What Equivalence point means in Chemistry A-Level, as defined for AQA, OCR.
Definitions of Equivalence point
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Reference: AQA
Marked by a near-vertical steep section on a pH curve, which spans pH 3-11 for strong acid-strong base.
The point at which the reaction is just complete; a suitable indicator changes colour close to it.
Topics that use Equivalence point
- pH curves, titrations and indicators (A-level only) (AQA A-Level)
- Acids (OCR A-Level)
Related terms
- Acid–base titration
- charge balance
- Concentration and mass concentration
- concordant titres
- Distinction between strength and concentration
- Indicator
- indicator choice
- Mole calculations from concentration and volume
Using Equivalence point in the exam
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