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Brainlag Learn / GCSE Chemistry

Organic chemistry

Crude oil and the alkanes, combustion and cracking, then alkenes, alcohols, carboxylic acids, esters and polymers for separate Chemistry, with the formula and mass calculations that go with them.

Lessons

  1. Crude oil, alkanes and fractional distillationWhat a hydrocarbon is, the alkanes and their general formula, how chain length changes a fuel's properties, and how a fractionating column splits crude oil. 22 min, free
  2. Combustion and crackingBalancing the equation for burning an alkane, what happens with too little oxygen, cracking long alkanes into shorter ones and alkenes, and the bromine water test. 22 min, free
  3. Alkenes and addition reactionsThe alkenes and their general formula, the C=C double bond, and what forms when hydrogen, steam or a halogen adds across it. 22 min, Plus, Chemistry only
  4. Alcohols, carboxylic acids and estersThe alcohols and their reactions, making ethanol by fermentation, carboxylic acids as weak acids, and how an alcohol and an acid make an ester. 25 min, with the Molar Mass Calculator, Plus, Chemistry only
  5. Addition, condensation and natural polymersHow alkenes join into addition polymers and how to draw the repeat unit, condensation polymers such as polyesters, and the natural polymers DNA, proteins, starch and cellulose. 22 min, Plus, Chemistry only
  6. Calculations with fuels and organic compoundsMr and the percentage of carbon in a hydrocarbon or alcohol, moles and masses of carbon dioxide from burning a fuel, gas volumes, and estimating boiling points from a homologous series. 25 min, with the Molar Mass Calculator, Plus

Practise and test

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