The pH Scale

Chemistry: Edexcel IGCSE, topic 12.1.3

Acidic vs Neutral vs Alkaline

Acidic substances have a pH less than 7; neutral substances have a pH of exactly 7; alkaline substances have a pH greater than 7.

Acid example = acid rain

Neutral example = pure water

Alkaline example = washing-up liquid

Test yourself on The pH Scale

  • Which of the following has the lower pH?

  • Which of the following is true for acids?

  • Which substance is NOT alkaline?

  • Alkalis

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