Key Stage 3
Meaning
A pH scale with the colours of Universal Indicator at those pH values and some examples of substances at those pH values.
pH is a scale numbered list from 1 to 14 that is used to identify how acidic or basic a substance is.
About pH
- pH is written with a lower case p and an upper case H and refers to the 'power of Hydrogen' as there are free Hydrogen atoms in an acid.
- Acids range from 0-6 on the pH scale with the strongest acids being at pH 0.
- Bases range from 8-14 on the pH scale with the strongest bases being at pH 14. Remember alkalis are a base dissolved in water.
- pH 7 is neutral.