"Explain" questions — IB DP Chemistry Standard Level (2023 syllabus)
97 questions · chemistry · View as Markdown
How to answer
WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.
Sample questions
- Explain what is meant by the term 'molar mass' and outline how the molar mass of a substance can be determined from the …
- Explain why fullerene C₆₀ has a much lower melting point than diamond, despite both being composed entirely of carbon at…
- Explain why the mass of carbon dioxide produced when excess hydrochloric acid reacts with calcium carbonate can be used …
- Explain why metals have high thermal conductivity and why this property decreases when the metal forms an alloy.
- Explain why the experimental value of the enthalpy change of neutralisation measured using a polystyrene cup calorimeter…
- Explain why magnesium oxide (MgO) has a higher melting point than sodium chloride (NaCl).
- Explain what happens at each electrode when a voltaic cell is constructed using a magnesium half-cell (Mg²⁺/Mg, E° = −2.…
- Explain why the value of the equilibrium constant, K, for a given reversible reaction changes when the temperature is in…