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Graphite is used as the inert electrodes. State the name of one other giant covalent structure made of carbon atoms. Graphite is a giant covalent structure made of carbon atoms.
See it on the paper →Graphite is one form of the element carbon. Fig. 6.3 shows the structure of graphite. carbon atom Fig. 6.3 Graphite is used to make electrodes because it conducts electricity. Explain why graphite conducts electricity.
See it on the paper →Name one product from this reaction.
See it on the paper →Graphite is used to make electrodes for electrolysis because it is a good conductor of electricity. Explain why graphite is a good conductor of electricity. Use ideas about structure and bonding.
See it on the paper →Explain why the structure of graphite makes it suitable for use as a lubricant.
See it on the paper →Explain why the structure of diamond makes it suitable for use in cutting tools.
See it on the paper →Which statement explains why diamond does not conduct electricity?
See it on the paper →Most candidates named either magnesium chloride or hydrogen as one of the products in the reaction.
— Examiner report, February/March 2025, 0654/32 Q5(b)(i) (Cambridge)
Some candidates knew that graphite acts as a lubricant due to the ease with which layers of atoms slide over each other. Fewer explained in terms of the weak forces between layers.
— Examiner report, May/June 2023, 0654/43 Q11(e)(i) (Cambridge)
Good explanations explained that the structure of diamond suits it for use in cutting tools by stating that diamond has many strong bonds or that each carbon atom is linked to four others by strong bonds, that the bonds are covalent, and that it has a giant molecular structure. Many responses simply described the physical properties of diamond.
— Examiner report, May/June 2023, 0654/43 Q11(e)(ii) (Cambridge)
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