pH scale

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5 Terms

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pH scale

A measure of how acidic or basic a substance is, written as pH, short for 'power of hydrogen'.

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Acid

An acidic substance that may taste sour and can be dangerous, causing corrosive accidents. Acids range from strong to weak on the pH scale, from 0 to 6.

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Base

A substance that can feel slippery or soapy and may taste bitter. Bases range from weak to strong on the pH scale, from 8 to 14.

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Neutral

A substance that is neither acidic nor basic and shows no properties of a strong acid or base. Pure water is a neutral with a pH of 7.

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Neutralisation

The reaction between an acid and a base, during which their acidic and basic properties begin to reduce.