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Acidity indicator colours

Acidity indicator colours

A500/0611

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Credit

MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY

Caption

Acidity indicator colours. Three test tubes containing an indicator solution and, from left to right, an acid, neutral water, and an alkali. An indicator is a chemical or mixture of chemicals that has a different colour depending on the pH (acidity) of the solution it is added to.

Release details

Model release not required. Property release not required.

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