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GCSE Chemistry · key term
A numerical scale used to compare the relative acidity or alkalinity of an aqueous solution.
Used by AQA, Edexcel and OCR
Specification 4.4.2.4 · Paper 1
A numbered scale, usually from 0 to 14, that measures the acidity or alkalinity of a solution.
Revise: pH Scale and NeutralisationThe pH scale measures how acidic or alkaline a solution is.
Specification 3.2 · Paper 1
A numerical scale used to describe how acidic or alkaline a solution is.
Revise: pH ScaleThe pH scale places solutions in order according to how acidic or alkaline they are.
Specification C3.3h · Paper 1 (Foundation), Paper 3 (Higher)
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A numerical scale used to compare the relative acidity and alkalinity of aqueous solutions.
Revise: pH scaleUniversal indicator is a mixture of indicators, so it produces a range of colours across the pH scale rather than making just one colour change.
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