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IB Chemistry SL 3.4.3 Heterolytic fission

IB Chemistry SL 3.4.3 Heterolytic fission
IB Chemistry syllabusFirst assessment 2025

Practise identifying heterolytic bond fission and using curly arrows to show electron-pair movement when a bond breaks to form ions in mechanisms.

How this is tested

  • identify equations or arrow diagrams that correctly show heterolytic fission to ions
  • describe curly arrows as movement of an electron pair towards a positively charged species
  • state heterolytic fission as the bond breaking step in SN1 and related mechanisms
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