Year 9 in England
8th grade chemical reactions, acids and bases
3 8th grade chemical reactions, acids and bases skills, each with a worked example, free practice that checks every answer, and a printable worksheet. Start with a mixed review, or jump to the skill you need.
Mixed review
Ten questions drawn from every skill below.
Neutralisation and naming salts
CCSS NGSS.MS-PS1-2CCSS NGSS.HS-PS1-2England: KS3 Chemistry: Chemical reactionsEngland: KS4 Combined Science: Chemical changes
Example
Name the salt: potassium hydroxide + nitric acid → ___ + water
- nitric acid → nitrate
- So the answer is: potassium nitrate
Answer: potassium nitrate
Exothermic and endothermic reactions
CCSS NGSS.MS-PS1-6CCSS NGSS.HS-PS1-4England: KS3 Chemistry: EnergeticsEngland: KS4 Combined Science: Energy changes in chemistry
Example
Is this exothermic or endothermic: thermal decomposition of calcium carbonate?
- Endothermic reactions take in energy from the surroundings, so the temperature falls.
- So the answer is: endothermic
Answer: endothermic
What acids make with metals and carbonates
CCSS NGSS.MS-PS1-2England: KS3 Chemistry: Acids and alkalisEngland: GCSE Combined Science: Chemical changes
Example
Zinc reacts with sulfuric acid. What are the products?
- sulfuric acid makes sulfate salts.
- So the answer is: zinc sulfate + hydrogen
Answer: zinc sulfate + hydrogen
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