Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Giant ionic structures
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →Lead(II) bromide (PbBr_2) is an example of a giant ionic compound. Explain why solid lead(II) bromide does not conduct electricity, but molten lead(II) bromide does.
Question 2
5 marks · Hard
Answer and see the solution →Sodium sulfide (Na_2S) and aluminium oxide (Al_2O_3) are both giant ionic compounds.
(a)[2 marks]Describe the arrangement of ions in the lattice of a giant ionic compound.
(b)[3 marks]Explain, using your knowledge of structure, why the melting point of aluminium oxide is much higher than that of sodium sulfide.
Question 3
2 marks · Hard
Answer and see the solution →State and explain whether potassium iodide (KI) has a high or low melting point. Refer to its structure in your answer.