WAEC Chemistry 2015 Theory — Question 20

Question 20 of 49 from the West African Examinations Council (WAEC) Chemistry 2015 Theory paper, with the correct answer and a full explanation.

2(b)(iii). Describe briefly the structure of sodium chloride in its solid state.

Model answer

In the solid form, sodium chloride has a face-centred cubic structure, made up of alternating Na⁺ and Cl⁻ ions held together by strong electrostatic (ionic) forces of attraction in a regular lattice arrangement.

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