3.2.3
Group 7(17), the Halogens
Course revision notes and study resources.
Trends in Group 7 Properties
Trends in electronegativity, boiling points, reactivity, and oxidising ability of halogens, and the reducing ability of halide ions.
→Halogen Displacement and Reactions with Halides
Displacement reactions in aqueous solution and reactions of halide ions with concentrated sulfuric acid to show trends in redox power.
→Tests for Halide Ions and Water Treatment
Testing for halide ions using silver nitrate and ammonia, and the chemistry, benefits, and risks of chlorine in water treatment.
→Exam Practice
MCQs and structured questions with AQA mark scheme answers.
→Flashcards
Review key definitions and concepts with interactive flashcards.