CAIE A-Level Chemistry 28.1.5 Transition Elements as Catalysts
Practise explaining transition-metal catalysis through variable oxidation states and accessible vacant d orbitals.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- A2
Exam points
- use multiple stable oxidation states to explain electron-transfer pathways in homogeneous catalysis
- use energetically accessible vacant d orbitals to accept ligand lone pairs and form temporary bonds
- connect these alternatives to a lower-activation-energy mechanism while the catalyst is regenerated
28.1.5—Why transition elements behave as catalysts question 1
[Maximum number: 2]
Explain why transition elements behave as catalysts.
M1: more than one (stable) oxidation state / exist in variable oxidation states
M2: vacant / empty (d) orbitals are energetically accessible
OR vacant / empty (d) orbitals can form dative bonds with ligands
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