Acids and Alkalis
The pH scale, indicators and neutralisation.
01Acids in Everyday LifeMeet acids in citrus fruits, vinegar and your stomach.Read lesson →02The pH ScaleUse the 1–14 scale to measure how acidic or alkaline a solution is.Read lesson →03Testing with IndicatorsUse litmus and universal indicator to test for acids and alkalis.Read lesson →04Acids Meet AlkalisSee how acids and alkalis cancel each other out.Read lesson →