AQA • A Level Chemistry

Oxidation, reduction, and redox equations are fundamental concepts in chemistry, particularly in the study of chemical reactions involving electron transfer. Oxidation Definition: Oxidation is the process where an atom, ion, or molecule loses one or more electrons. Oxidation State: The oxidation state (or oxidation number) of the species increases. Example: In the reaction Fe → Fe 2 + + 2 e − Fe→Fe 2+ +2e − , iron (Fe) is oxidized to iron(II) ion (Fe²⁺). Redu...

Chemical equilibrium occurs in a chemical reaction when the rate of the forward reaction equals the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products. At equilibrium, the system is dynamic, meaning the reactions continue to occur, but the concentrations of the reactants and products remain constant over time. The equilibrium constant, K c K c ​ , is a numerical value that expresses the ratio of the concentrations of products t...

Digital notes on Period 3 oxides for AQA A-level chemistry, unit 3.2.4. It contains the trends across period 3, reactions of period 3 oxides as well as tips on answering exam questions on this topic. Notes are easy to read and neatly laid out. (Actual PDF is in a normal layout - different to preview on Stuvia).

In depth notes on the 'Transition metals' topic for the AQA A-Level Chemistry course. Includes detailed explanations, equations with observations and key concepts to learn for the exam, Specifically goes through catalysts, oxidation states, ligand substitution, and complex formation. Written by an A* student.

In depth notes on the 'Redox' topic of the AQA A-Level Chemistry course. Includes key definitions, detailed explanations, and equations.

In depth notes on the 'Reactions of Ions in Aqueous Solution' topic in the AQA A-Level Chemistry course. Includes observations and equations for memorisation, and a summary page. Written by an A* student.

In depth notes on the 'Rate equations' topic of the AQA A-Level Chemistry course. Includes examples, detailed explanations and definitions, including for the rate determining step.

In depth notes on the 'Polymers' topic of the AQA A-Level Chemistry course. Includes equations, key examples to memorise, detailed explanations and diagrams. Written by an A* student.

In depth notes for the 'Periodicity' topic of the AQA A-Level Chemistry course. Includes key definitions and explanations related to ionisation energy, electronegativity and melting/boiling point trends across a period. Written by an A* student.

In depth notes on the 'Period 3' topic for the AQA A-Level Chemistry course. Includes definitions, keywords, and key equations with observations. Written by an A* student.