Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
611–620 of 991
Question 611
4 marks · Normal
Answer and see the solution →The following ions are present in a solution: Ca2+, OH–, Fe3+, Cl–.
(a)[1 mark]Name the ionic compound formed when Ca2+ reacts with OH–.
(b)[1 mark]Write the formula of the compound formed between Ca2+ and OH–.
(c)[1 mark]Write the formula for the compound formed when Fe3+ reacts with Cl–.
(d)[1 mark]State why brackets are used in the formula for the compound formed between Ca2+ and OH–.
Question 612
3 marks · Normal
Answer and see the solution →Calculate the formula for the ionic compound formed between magnesium ions (Mg2+) and phosphate ions (PO4^3–). Show your working.
Question 613
3 marks · Normal
Answer and see the solution →Explain how you work out the formula for iron(II) sulfate, using the charges on the ions and their names.
Question 614
4 marks · Normal
Answer and see the solution →The table shows the ions present in four different ionic compounds. Complete the formula for each compound in the table below:
Compound name Ions Formula sodium sulfide Na+, S2– zinc nitrate Zn2+, NO3– aluminium sulfate Al3+, SO4^2– ammonium phosphate NH4+, PO4^3– Question 615
1 mark · Normal
Answer and check →What is the formula for copper(II) nitrate?
- A.Cu(NO3)2
- B.Cu2NO3
- C.CuNO3
- D.(CuNO3)2
Question 616
2 marks · Normal
Answer and see the solution →Write the formula for these ionic compounds:
(a)[1 mark]sodium phosphate
(b)[1 mark]calcium carbonate
Question 617
4 marks · Normal
Answer and see the solution →For each of the following, state the ions present, their charges, and the correct formula for the compound:
(a)potassium nitrate
(i)[1 mark]State the ions and their charges.
(ii)[1 mark]Write the formula for potassium nitrate.
(b)magnesium chloride
(i)[1 mark]State the ions and their charges.
(ii)[1 mark]Write the formula for magnesium chloride.
Question 618
2 marks · Hard
Answer and see the solution →Iron(III) oxide is an ionic compound formed from Fe3+ and O2– ions. State the correct formula for iron(III) oxide and explain why this is the correct formula.
Question 619
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 620
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.