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ChemistryAcids, Bases and Salts
pH Scale Explorer
Slide through the pH scale and see indicator colours and H⁺ concentration.
Controls
7
Live result
Nature
Neutral
[H⁺]
10^-7mol/L
Litmus
No change
Phenolphthalein
Colourless
pH7
pH scale — indicator & ion balancepH 7
pH = −log[H⁺]. A change of 1 pH unit means a 10× change in H⁺ concentration.