IB Chemistry SL Reactivity 3.4.3 Heterolytic Bond Fission

Practise representing heterolytic bond fission, where both bonding electrons move to one atom and ionic fragments form. Draw one full curly arrow from the bond to the…

Syllabus
First assessment 2025
Objective
3.4.3
Level
SL

Exam points

  • move both bonding electrons to one atom using a full double-barbed curly arrow
  • assign a negative charge to the fragment receiving the pair and positive to the other
  • distinguish ionic heterolysis from radical-forming homolysis in equations and diagrams

3.4.3—Heterolytic fission question 1

[Maximum number: 1]

Which row correctly shows heterolytic fission?

A

Br↶Br→Br++Br−\mathrm{Br} \underset{\mathrm{Br}}{\curvearrowleft} \rightarrow \mathrm{Br}^{+}+\mathrm{Br}^{-}

B

Br↶Br→2Br\mathrm{Br} \underset{\mathrm{Br}}{\curvearrowleft} \rightarrow 2 \mathrm{Br}.

C

BrBrBr→Br++Br−\mathrm{Br} \stackrel{\mathrm{Br}}{\mathrm{Br}} \rightarrow \mathrm{Br}^{+}+\mathrm{Br}^{-}

D

BrBrBr→2Br\mathrm{Br} \stackrel{\mathrm{Br}}{\mathrm{Br}} \rightarrow 2 \mathrm{Br}.

All question bank results loaded