Chemistry A-Level
cosmetic and food buffers
What cosmetic and food buffers means in Chemistry A-Level, as defined for AQA.
Definition of cosmetic and food buffers
Check what you remember
Read the wording for your board, then hide it and explain cosmetic and food buffers in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Shampoos and skin creams are buffered near pH 5.5 to match skin, and foods are buffered with citric acid and a citrate salt to control flavour and inhibit bacteria.
Topics that use cosmetic and food buffers
- Buffer action (A-level only) (AQA A-Level)
Related terms
- acidic buffer
- basic buffer
- blood plasma buffering
- buffer pH calculation
- carbonic acid and hydrogencarbonate
- named species in buffer action
- partial neutralisation
- ratio controls pH
Using cosmetic and food buffers in the exam
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