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IB Chemistry SL 2.2.7 Covalent Network Structures Questions

Use exam questions to connect carbon and silicon network structures with conductivity, hardness and melting behaviour.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Identify the three-dimensional or layered network geometry and covalent bonding around carbon or silicon atoms from a structure or diagram.
  • Explain graphite or graphene conductivity through mobile delocalised electrons while distinguishing them from diamond or silicon dioxide.
  • Compare melting point, hardness or strength by the number and strength of covalent bonds that must be broken, including weak interlayer forces where relevant.

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Study 2.2.7—Covalent network structures conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry SL 2.2.7 Covalent Network Structures Questions question 1

[Maximum number: 2]

Electrolysis and Winkler titrations are both applications of redox reactions.

An electrolytic cell was set up using inert electrodes and molten magnesium chloride, MgCl2(l)\mathrm{MgCl}_{2}(\mathrm{l}).

Figure for Question IB Chemistry SL 2.2.7 Covalent Network Structures Questions question 1 — IB Chemistry SL

Graphite rods are sometimes used as inert electrodes. Describe the structure of graphite and explain why graphite conducts electricity.

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