Chemistry A-Level
Weak-acid approximation for [H⁺]
What Weak-acid approximation for [H⁺] means in Chemistry A-Level, as defined for OCR.
Definition of Weak-acid approximation for [H⁺]
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Reference: OCR
It is assumed that [H⁺] ≈ [A⁻] because the acid is the main source of protons and autoionisation of water is negligible.
Topics that use Weak-acid approximation for [H⁺]
- Acids, bases and buffers (OCR A-Level)
Related terms
- Acid dissociation constant Ka
- acidic buffer
- Amphiprotic
- basic buffer
- Basicity
- Buffer action against added acid and alkali
- Buffer action and pH resistance
- Calibration with buffer solutions
Using Weak-acid approximation for [H⁺] in the exam
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