IB Chemistry SL 2.2.7 Covalent Network Structures Question Bank

Practise IB Chemistry SL 2.2.7 by linking giant covalent structures and carbon allotropes to bonding, conductivity, hardness and other physical properties.

Exam points

identify network geometry and bonding around carbon or silicon atoms from a diagram
explain graphite or graphene conductivity through mobile delocalised electrons
compare melting or hardness through the number and strength of covalent bonds broken

[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, $\mathrm{MgCl}_{2}(\mathrm{l})$ .

Figure for Question 2.2.7—Covalent network structures 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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2.2.7—Covalent network structures question 1