Key term
AQA GCSE Chemistry 8462
Atomic Structure and the Periodic Table
Topic overviewAtoms, elements and compoundsWord equations, symbols and balanced equationsMixturesFrom the plum pudding model to the nuclear modelBohr, Chadwick and the modern model of the atomRelative electrical charges of subatomic particlesSize and mass of atomsRelative atomic mass and electronic structureThe periodic tableDevelopment of the periodic tableMetals and non-metalsGroup 0Group 1Group 7Transition metals, and how they differ from Group 1
Bonding, Structure, and the Properties of Matter
Topic overviewChemical bonds, including metallic bondingIonic bondingIonic compoundsCovalent bonding and how it is representedThe three states of matter and changes of statePredicting state, state symbols, and the limits of the particle modelProperties of ionic compoundsProperties of small moleculesPolymers and giant covalent structuresProperties of metals and alloys, and why metals conductDiamond and graphiteGraphene and fullerenesSizes of particles and their propertiesUses of nanoparticles
Chemical Analysis
Chemical Changes
Topic overviewThe reactivity seriesMetal oxides, extraction, and redox in terms of electronsAcids reacting with metals, neutralisation and saltsSoluble saltsThe pH scale and neutralisationTitrationsThe process of electrolysis, and molten ionic compoundsUsing electrolysis to extract metalsElectrolysis of aqueous solutions
Chemistry of the Atmosphere
Topic overviewThe Earth's early atmosphereHow oxygen increased and carbon dioxide decreasedThe gases in today's atmosphere, and which are greenhouse gasesHuman activities which contribute to an increase in greenhouse gases in the atmosphereGlobal climate change and carbon footprintsAtmospheric pollutants from fuels, and their effects
Energy Changes
Organic Chemistry
Topic overviewCrude oil, hydrocarbons and alkanesFractional distillation and petrochemicalsProperties of hydrocarbonsCracking, and testing alkenes with bromine waterWhy cracking is useful, and equations for itStructure and formulae of alkenesReactions of alkenesAlcoholsCarboxylic acidsAddition polymerisationAmino acids, DNA and naturally occurring polymers
Quantitative Chemistry
The Rate and Extent of Chemical Change
Using Resources
Topic overviewUsing the Earth's resources and sustainable developmentProducing potable water in the UKDesalination, and analysing water samplesWaste water treatmentLife cycle assessmentWays of reducing the use of resourcesCorrosion and its preventionAlloys as useful materialsGlass, clay ceramics and polymersComposites, and comparing materialsThe Haber processProduction and uses of NPK fertilisers
Chemical Changes
Acids reacting with metals, neutralisation and salts
- 3 things to know
- Paper 1
Overview
Metals reacting with dilute acids to give a salt and hydrogen, word and balanced equations and the test for hydrogen, neutralisation of acids by alkalis, bases and metal carbonates, the difference between a base and an alkali, naming salts from their acids, and deducing salt formulae from their ions.
What you need to know
Answer each one before you reveal it.
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Key term
Write a word equation for zinc reacting with dilute hydrochloric acid.
Key term
Describe the test that identifies the gas given off when magnesium is added to dilute acid.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name the two products formed when a dilute acid reacts with a suitable metal.
Model answer
A salt and hydrogen.
- 2
Write a word equation for zinc reacting with dilute hydrochloric acid.
Model answer
Zinc + hydrochloric acid → zinc chloride + hydrogen.
- 3
Describe the test that identifies the gas given off when magnesium is added to dilute acid.
Model answer
A lighted splint is held at the mouth of the tube and the gas burns with a squeaky pop, showing hydrogen.
- 4
Name the three metals whose reactions with dilute acids you are expected to know.
Model answer
Magnesium, zinc and iron.
- 5
Name the salt produced when zinc reacts with dilute sulfuric acid.
Model answer
Zinc sulfate.
- 6
Write the balanced equation for magnesium reacting with dilute hydrochloric acid.
Model answer
Mg + 2HCl → MgCl₂ + H₂.
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