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
51–60 of 60 · Normal
Question 51
3 marks · Normal
Answer and see the solution →A student is asked to test whether lithium bromide conducts electricity in three different states:
- solid lithium bromide
- molten (melted) lithium bromide
- lithium bromide dissolved in water
Explain, using the idea of moving ions, in which of these states lithium bromide will conduct electricity. Show your reasoning for each case.
Question 52
3 marks · Normal
Answer and see the solution →Copper(II) sulfate is an ionic compound. Predict and explain whether it will conduct electricity in each of these conditions: (a) as a solid (b) when dissolved in water. Give reasons for your answers.
Question 53
4 marks · Normal
Answer and see the solution →The table below shows the electrical conductivity of three ionic compounds in solid and molten states.
Substance Conducts when solid? Conducts when molten? Potassium iodide Magnesium oxide Sodium nitrate Complete the table by indicating Yes or No for each box. Then, explain your reasoning for one of your answers.
Question 54
1 mark · Normal
Answer and check →Which of the following best explains why molten potassium bromide conducts electricity?
- A.The ions are free to move and carry charge.
- B.The electrons are free to move between ions.
- C.The molecules are able to gain or lose electrons.
- D.The atoms are bonded together covalently.
Question 55
2 marks · Normal
Answer and see the solution →State two states of ionic substances in which they conduct electricity. For each state, give a reason why conduction is possible.
Question 56
4 marks · Normal
Answer and see the solution →(a)[2 marks]Explain, using particles, why solid magnesium chloride does not conduct electricity.
(b)[2 marks]Describe what changes when magnesium chloride melts and how this allows conduction.
Question 57
6 marks · Normal
Answer and see the solution →This question is about the bonding and formulae for lithium fluoride and calcium chloride.
(a)[2 marks]Draw a dot-and-cross diagram to show the ionic bonding in lithium fluoride.
(b)[2 marks]Explain, using ion charges, why the formula for calcium chloride is .
(c)[2 marks]Write the formula for ammonium sulfate.
Question 58
6 marks · Normal
Answer and see the solution →This question is about the bonding and formulae of calcium chloride and other ionic compounds.
(a)[3 marks]Draw a dot-and-cross diagram to show the ionic bonding in calcium chloride ().
(b)[1 mark]State the electronic configuration of a chloride ion.
(c)[2 marks]Write the formula for copper(II) nitrate.
Question 59
6 marks · Normal
Answer and see the solution →This question is about explaining ionic bonding using calcium chloride and applying rules to deduce formulae for ionic compounds.
(a)[3 marks]Explain, in terms of electron transfer and ion formation, how calcium chloride () forms from its elements.
(b)[2 marks]Sodium oxide is another ionic compound. Write its formula and justify your answer using the charges on the ions.
(c)[1 mark]Copper(II) sulfate contains Cu2+ and SO4^2− ions. Explain why the correct formula is CuSO4.
Question 60
6 marks · Normal
Answer and see the solution →This question is about calcium chloride and how to write the formula for ionic compounds.
(a)[3 marks]Draw a dot-and-cross diagram to show how the electrons are arranged in calcium chloride (CaCl₂). Clearly show all outer shell electrons and use a key to show electrons from different atoms.
(b)[3 marks]Magnesium reacts with oxygen to form magnesium oxide. Write the formula for magnesium oxide and explain how you worked it out.