Chemical changes
Acids and alkalis - Edexcel
Indicators are used to determine if a solution is acidic or alkaline. Acids react with metals, bases and carbonates to produce salts. Neutralisation is the reaction between an acid and a base.

Salts - Edexcel
Soluble salts can be made by reacting acids with soluble or insoluble reactants. Titration must be used if the reactants are soluble. Insoluble salts are made by precipitation reactions.

QUIZ: Acids, alkalis and salts (1)
This interactive quiz is for GCSE Chemistry (single science) students studying acids, alkalis and salts. Test your knowledge on neutralisation, reactions with acids and solutions.

QUIZ: Acids, alkalis and salts (2)
This interactive quiz is for GCSE Chemistry (single science) students studying acids, alkalis and salts. Test your knowledge of indicators, reactions and chemical equations.

Electrolysis - Edexcel
Electrolysis involves using electricity to break down electrolytes to form elements. The products of electrolysis can be predicted for a given electrolyte. Copper can be purified using electrolysis.

QUIZ: Electrolysis
This interactive quiz is for GCSE Chemistry (single science) students studying Electrolysis. Electrolysis involves using electricity to break down electrolytes to form elements.

Sample exam questions - chemical changes - Edexcel
Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

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