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GCSE Combined Science · key term
An indicator that changes through a range of colours at different pH values, allowing the approximate pH to be estimated.
Used by AQA
Specification 5.4.2.4 · Paper 3
Revise: The pH Scale and NeutralisationUniversal indicator is a wide-range indicator: it produces different colours across a broad range of pH values, rather than simply distinguishing an acid from an alkali.
Universal indicator gives an approximate pH: compare its colour with the chart supplied for that indicator.
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