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
81–90 of 143
Question 81
1 mark · Easy
Answer and see the solution →Name the forces that hold the ions together in a giant ionic lattice.
Question 82
3 marks · Easy
Answer and see the solution →Barium chloride (BaCl_2) is an ionic compound.
(a)[1 mark]Name the ions present in barium chloride.
(b)[1 mark]State one property of barium chloride that is linked to its structure.
(c)[1 mark]Explain how the structure of barium chloride leads to this property.
Question 83
2 marks · Easy
Answer and see the solution →Lithium oxide (Li_2O) is an ionic compound formed from lithium ions (Li^+) and oxide ions (O^{2-}).
How many electrons in total are transferred from lithium atoms to oxygen atoms to form one formula unit of lithium oxide? Show your working.
Question 84
2 marks · Normal
Answer and see the solution →Sodium chloride is an ionic compound with a giant lattice structure.
State TWO properties of sodium chloride that are linked to its giant ionic lattice, and briefly explain why the lattice causes each property.
(a)[2 marks](b)[0 marks]Question 85
4 marks · Normal
Answer and see the solution →Magnesium oxide (MgO) is a typical giant ionic compound.
(a)[1 mark]State the ions present in magnesium oxide.
(b)[2 marks]Explain why magnesium oxide has a very high melting point.
(c)[1 mark]Describe what happens to the ions when solid magnesium oxide melts.
Question 86
3 marks · Normal
Answer and see the solution →Explain why giant ionic structures conduct electricity when molten but do not conduct when solid.
Question 87
4 marks · Normal
Answer and see the solution →The table below gives the melting points and ability to conduct electricity in the solid and molten states for some ionic compounds:
Melting points and conductivity of ionic compounds Compound Melting point (°C) Conducts electricity when solid? Conducts electricity when molten? Sodium chloride 801 No Yes Magnesium oxide 2852 No Yes Potassium bromide 734 No Yes (a)[1 mark]Which compound has the highest melting point?
(b)[2 marks]Suggest a reason why all three compounds do not conduct when solid.
(c)[1 mark]What allows these compounds to conduct when molten?
Question 88
1 mark · Normal
Answer and check →Which property best explains why potassium chloride has a high melting point?
- A.It consists of molecules joined by covalent bonds.
- B.Its ions are arranged in layers that slide past each other.
- C.It is made of positive and negative ions held by strong electrostatic forces.
- D.It has delocalised electrons that conduct electricity.
Question 89
2 marks · Normal
Answer and see the solution →Describe the structure of a giant ionic compound and explain how this structure is linked to its melting point.
Question 90
4 marks · Normal
Answer and see the solution →Calcium chloride is an ionic compound with the formula CaCl_2.
(a)[1 mark]Name the ions present in calcium chloride.
(b)[2 marks]Explain why calcium chloride is soluble in water but does not conduct electricity when solid.
(c)[1 mark]What must happen for solid calcium chloride to conduct electricity?