🔬 Science · Matter & Materials
Acids, Alkalis & pH
Define acids and alkalis in terms of hydrogen ion concentration, describe the pH scale (0–14), and explain how indicators are used to identify and measure acidity or alkalinity
Typical age: 12–13 years
“If your child used a piece of universal indicator paper to test lemon juice and baking soda solution, could they predict what colour each would turn and explain what that tells you about each substance?”
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