Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Ionic Bonding
143 practice questions
Topics covered
- Ionic bonding in magnesium oxide19 practice questions
- Other examples of ionic bonding19 practice questions
- Calcium chloride19 practice questions
- Formulae for ionic compounds18 practice questions
- Giant ionic structures19 practice questions
- The physical properties of ionic substances19 practice questions
- The electrical conductivity of ionic substances19 practice questions
Practice questions
11–20 of 24 · Hard
Question 11
5 marks · Hard
Answer and see the solution →Potassium ions (K+) and phosphate ions (PO4^3–) combine to form an ionic compound.
(a)[2 marks]State the symbol and charge of the potassium ion and the phosphate ion.
(b)[3 marks]Explain, with working, how to deduce the simplest formula for the ionic compound formed from these ions.
Question 12
2 marks · Hard
Answer and see the solution →State the formula for the ionic compound formed between ammonium ions and nitrate ions. Explain your answer.
Question 13
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 14
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 15
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.
Question 16
2 marks · Hard
Answer and see the solution →Explain, in terms of the forces present, why ionic compounds such as sodium chloride have high boiling points.
Question 17
5 marks · Hard
Answer and see the solution →Crystals of sodium chloride are often seen as large, regular cubes under the microscope.
(a)[1 mark]State what is meant by the term 'crystalline' when describing a substance.
(b)[2 marks]Describe the arrangement of ions in the giant ionic lattice of sodium chloride as it relates to its crystalline appearance.
(c)[2 marks]Explain why the regular arrangement of ions results in sodium chloride crystals having a regular shape.
Question 18
2 marks · Hard
Answer and see the solution →Describe the arrangement of sodium and chloride ions in the giant ionic lattice of sodium chloride.
Question 19
2 marks · Hard
Answer and see the solution →Explain, in terms of ions, why solid sodium oxide does not conduct electricity.
Question 20
5 marks · Hard
Answer and see the solution →Lead(II) nitrate is an ionic compound. It can be either solid, molten, or dissolved in water.
(a)[2 marks]State whether lead(II) nitrate conducts electricity in each of the following states:
State Does it conduct? (Yes/No) Solid Molten Aqueous solution (b)[3 marks]Explain, in terms of ions, why lead(II) nitrate behaves in this way in these states.