AQA GCSE Combined Science: Synergy · 8465
Specification 4.5.1.4 · Paper 3, Paper 4
Revise: Group 1Universal indicator turns blue or purple in the resulting alkaline solution.
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GCSE Combined Science · key term
A solution with a pH greater than 7.
Used by AQA and OCR
Specification 4.5.1.4 · Paper 3, Paper 4
Revise: Group 1Universal indicator turns blue or purple in the resulting alkaline solution.
Specification C3.3h · Chemistry Paper 1
A solution with a pH above 7.
Typically, acidic solutions produce red, orange or yellow colours, neutral solutions green, and alkaline solutions blue or purple.
When comparing acidic solutions, the lower pH is more acidic. When comparing alkaline solutions, the higher pH is more alkaline.
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