IB DP Chemistry Higher Level (2023 syllabus) · IB ib-chem-hl
R3 Reactivity 3: What are the mechanisms of chemical change?
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Reactivity 3: What are the mechanisms of chemical change?
- Explain why the standard electrode potential (E°) for the Fe³⁺/Fe²⁺ half-cell cannot be me… (4 marks, Explain)
- Explain why the pH of a solution of ammonium chloride (NH₄Cl) is less than 7 at 25 °C, mak… (4 marks, Explain)
- Explain why a galvanic cell constructed from a zinc half-cell connected to a copper half-c… (4 marks, Explain)
- Explain why hex-1-ene reacts with hydrogen bromide to produce predominantly 2-bromohexane … (4 marks, Explain)
- Explain why the standard electrode potential of the Cl₂/Cl⁻ half-cell is more positive tha… (4 marks, Explain)
- Explain why the pH at the equivalence point of a titration of 25.0 cm³ of 0.100 mol dm⁻³ e… (4 marks, Explain)
- Explain why the addition of a small amount of hydrochloric acid to a buffer solution conta… (4 marks, Explain)
- Explain why a solution of sodium ethanoate (CH₃COONa) is basic, making reference to the re… (4 marks, Explain)
- Explain why a buffer solution formed by mixing excess ethanoic acid with sodium hydroxide … (4 marks, Explain)
- Explain why cyclohexene reacts with bromine to produce only one dibromide product, whereas… (4 marks, Explain)
- Explain why the standard cell potential, E°cell, of a galvanic cell decreases to zero as t… (4 marks, Explain)
- Explain why magnesium is a more effective reducing agent than iron, using standard electro… (4 marks, Explain)
- Explain why but-1-ene reacts with bromine water to give predominantly 2-bromobutanol rathe… (4 marks, Explain)
- Explain why propene reacts with concentrated sulfuric acid to form propan-2-yl hydrogensul… (4 marks, Explain)