Chemistry A-Level
ratio controls pH
What ratio controls pH means in Chemistry A-Level, as defined for AQA.
Definition of ratio controls pH
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Reference: AQA
Since [H⁺] = Ka × [HA]/[A⁻], only the ratio matters, and dilution divides both concentrations by the same factor so the pH is unchanged.
Topics that use ratio controls pH
- Buffer action (A-level only) (AQA A-Level)
Related terms
- acidic buffer
- basic buffer
- blood plasma buffering
- buffer pH calculation
- carbonic acid and hydrogencarbonate
- cosmetic and food buffers
- named species in buffer action
- partial neutralisation
Using ratio controls pH in the exam
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