Chemistry Paper 2
Purity and formulations
Chemical Analysis training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Purity and formulations is like changing a recipe: the particles, amounts and conditions decide what product you can make.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
A pure substance has a sharp melting or boiling point.
A formulation is a useful mixture with a carefully controlled composition.
Chromatography can separate substances in a mixture.