Group 17

Worked examples (6)

• 1Colours and states (2 marks)
• 2Stating the down-group trends (2 marks)
• 3Explaining the volatility trend (3 marks)
• 4Electronegativity trend (3 marks)
• 5Boiling-point trend and predicting astatine (4 marks)
• 6Halogen colours in water and cyclohexane (3 marks)

Worked examples (6)

• 1Reactivity with hydrogen (2 marks)
• 2Predicting displacement (2 marks)
• 3Halogen displacement (3 marks)
• 4Thermal stability of HX (3 marks)
• 5Explaining the oxidising-power trend (4 marks)
• 6Displacement ionic equations and colours (4 marks)

Worked examples (6)

• 1Identifying halides (3 marks)
• 2Explaining the reducing-power trend (2 marks)
• 3Reducing power with conc. H₂SO₄ (4 marks)
• 4The intermediate case: NaBr (3 marks)
• 5Ranking reducing power from the products (4 marks)
• 6Deducing an unknown halide (4 marks)

Worked examples (6)

• 1Water chlorination (3 marks)
• 2Products with cold vs hot NaOH (2 marks)
• 3Chlorine with cold NaOH (3 marks)
• 4Chlorine with hot concentrated NaOH (2 marks)
• 5Benefits and risks of chlorination (4 marks)
• 6Chlorine in water as disproportionation (4 marks)