CourseCourseConceptConceptDocsDocuments

IB Chemistry HL 3.3.2 Homolytic Fission Questions

Use real HL exam questions to represent homolytic fission with single-electron arrows and write balanced halogen initiation equations under UV or heat.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Explain homolytic fission as breaking a covalent bond so one electron goes to each atom, producing radical dots and single-barbed electron movement.
  • State the UV-light or heat initiation of a halogen bond and write a balanced initiation equation with radical products.

Learn this topic

Study 3.3.2—Homolytic fission conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry HL 3.3.2 Homolytic Fission Questions question 1

[Maximum number: 1]

Nitrous acid, HNO2\mathrm{HNO}_{2}, is a weak acid which can be used to make acidic buffers.

Ethyl ethanoate can be produced by the reaction of ethanol with ethanoic acid. Both reactants can be synthesized from ethane through a series of reactions, the first of which is shown.

C2H6( g)+Cl2( g)→C2H5Cl( g)+HCl( g)\mathrm{C}_{2} \mathrm{H}_{6}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}(\mathrm{~g})+\mathrm{HCl}(\mathrm{~g})

The first step in this reaction, initiation, is given by the following equation.

Cl2→2Cl⋅\mathrm{Cl}_{2} \rightarrow 2 \mathrm{Cl} \cdot

State an essential condition for this reaction.

All question bank results loaded