scholarlab.KS3 Science
C4

Reactions, Acids and Alkalis

Evidence for chemical change, equations and mass conservation, followed by pH and salt preparation.

Indicative relationship: Activate 2 · Chemical Reactions and Acids and Alkalis · Activate 2 · Chemical Reactions and Acids and Alkalis chapters
BIG QUESTION / BIG PICTURE

How can evidence show that atoms have rearranged, and how can reactions be controlled?

Chemical reactions make new substances. Equations, energy changes, pH and neutralisation help chemists describe and control those changes.

Where this mattersclean fuelsindigestion remediessoil treatment and salt manufacture

Spiral links

This topic builds on and feeds forward to:

  • Y7 C1: atoms, formulae, mixtures and separation
  • Y8 C3: element families and reactivity
  • Y9 IGCSE Bridge: equations, energetics and acids

Lessons in this topic

C4.1

Chemical reactions

Core explanation, retrieval and Exam Practice.

C4.2

Word equations

Core explanation, retrieval and Exam Practice.

C4.3

Burning fuels

Practical connection: Combustion evidence demonstration

C4.4

Thermal decomposition

Practical connection: Carbonate decomposition

C4.5

Conservation of mass

Core explanation, retrieval and Exam Practice.

C4.6

Exothermic and endothermic reactions

Practical connection: Reaction-energy

C4.7

Acids and alkalis

Core explanation, retrieval and Exam Practice.

C4.8

Indicators and pH

Practical connection: Indicator investigation

C4.9

Neutralisation

Practical connection: pH change

C4.10

Acid strength

Core explanation, retrieval and Exam Practice.

C4.11

Making salts

Practical connection: Salt preparation