Organic chemistry

Organic chemistry is the study of carbon-based compounds, which form the basis of all living things and many synthetic materials. In AQA GCSE Chemistry, this topic introduces you to the unique bonding properties of carbon, allowing it to form chains and rings. You'll explore homologous series such as alkanes, alkenes, and alcohols, learning their general formulas, properties, and reactions. This topic is crucial because it connects to everyday life—from fuels and plastics to soaps and medicines—and underpins many industrial processes.

The curriculum focuses on the structure, naming, and reactions of simple organic molecules. You'll learn about fractional distillation of crude oil to produce useful fractions like petrol and diesel, and how cracking converts long-chain hydrocarbons into more valuable shorter ones. Combustion, addition reactions of alkenes, and the production of ethanol are key reaction types. Understanding organic chemistry also helps you appreciate issues like climate change (from burning fossil fuels) and the importance of sustainable alternatives.

Organic chemistry builds on earlier topics like bonding and chemical reactions. It introduces new concepts such as functional groups and isomerism, which are foundational for A-level studies. Mastering this topic requires careful attention to naming conventions and reaction conditions. By the end, you should be able to draw displayed formulas, write balanced equations, and explain how different organic compounds are used in society.