Equations and Reaction Types
Use this landing page to move quickly between the key equations and reaction types revision pages for Edexcel Topic 5. Each card links to a focused page covering chemical equations, acid reactions and ionic equations.
Choose an Equations and Reaction Types Page
Equations and reaction types link chemical formulae to what actually happens during a chemical change. These pages build from writing balanced chemical equations through to recognising acid reactions and writing ionic equations.
Key idea: A balanced chemical equation shows the correct formulae of the reactants and products, while the reaction type helps you predict what products are formed.
Equations
Writing Chemical Equations
Revise word equations, symbol equations, balancing equations and the correct use of state symbols.
Reactions
Typical Reactions of Acids
Learn the common products formed when acids react with metals, bases, alkalis and carbonates.
Equations
Ionic Equations
Learn how ionic equations show only the reacting ions and remove spectator ions from chemical equations.
How to Use These Pages
Start with writing chemical equations so that your formulae, coefficients and state symbols are accurate. Then move to typical acid reactions, because these product patterns appear frequently in early quantitative chemistry. Finally, use the ionic equations page to practise removing spectator ions and showing the ions that actually react.
Exam focus: When writing equations, check formulae before balancing. Changing a subscript changes the substance, but changing a coefficient changes the number of particles or formula units.
Copyright notice: This revision page, including its written explanations, layout and teaching sequence, is produced for Online Learning System by Dr. Mohammed Al-Fatah. It is intended for student revision and may not be copied, redistributed or republished without permission.