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Brainlag Learn / GCSE Chemistry

Chemical changes: reactivity, acids and electrolysis

The reactivity series and metal extraction, oxidation and reduction, acids, salts and pH, titrations, and electrolysis of melts and solutions.

Lessons

  1. The reactivity series and extracting metalsRanking metals by how they react with water and acids, displacement reactions, oxidation and reduction as oxygen gained and lost, and extracting metals with carbon. 25 min, with the Molar Mass Calculator, free
  2. Redox with electrons, and metals with acidsOxidation and reduction as loss and gain of electrons, ionic equations for displacement, and the salt and gas made when a metal reacts with an acid. 20 min, with the Periodic Table, free, Higher tier
  3. Acids, alkalis and making saltsThe pH scale, neutralisation, naming salts and writing their formulae, and the required practical for making crystals of a soluble salt. 25 min, with the Periodic Table, Plus
  4. Strong and weak acids, and titrationsStrength versus concentration, how pH changes by one unit for every factor of 10 in hydrogen ion concentration, and titrations with their calculations. 25 min, with the Molar Mass Calculator, Plus, Higher tier, Chemistry only
  5. Electrolysis of melts and solutionsHow a current splits an ionic compound, what forms at each electrode when it is molten, and the rules for which products form from a solution. 20 min, Plus
  6. Aluminium, half equations and the electrolysis practicalExtracting aluminium with cryolite and carbon anodes, half equations at each electrode, masses of products, and the required practical on electrolysing solutions. 25 min, with the Molar Mass Calculator, Plus, Higher tier

Practise and test

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