Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Calculations with equations involving solutions
19 practice questions
Practice questions
1–8 of 8 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the mass of sodium chloride, NaCl, produced when 0.025 mol of NaCl is formed in a reaction.
Question 2
3 marks · Easy
Answer and see the solution →A solution contains 0.30 mol/dm³ potassium chloride, KCl. 40 cm³ of this solution is measured out.
(a)[1 mark]Convert 40 cm³ to dm³.
(b)[2 marks]Calculate the number of moles of KCl in 40 cm³ of solution.
Question 3
2 marks · Easy
Answer and see the solution →The equation for a reaction is:
Calculate the number of moles of silver nitrate, AgNO₃, required to react with 0.030 mol of sodium carbonate, Na₂CO₃.
Question 4
2 marks · Easy
Answer and see the solution →A student adds 50 cm³ of 0.20 mol/dm³ hydrochloric acid, HCl, to excess calcium carbonate, CaCO₃.
The equation is:
Explain, using calculations, how to find the mass of CaCO₃ that will react with the HCl. Include your method and final answer. (Ar: Ca = 40, C = 12, O = 16)
Question 5
3 marks · Easy
Answer and see the solution →A student prepares solutions of nitric acid with different concentrations. The table shows the volume and concentration of nitric acid used in each experiment.
Volume and concentration data for nitric acid solutions. Experiment Volume (cm³) Concentration (mol/dm³) 1 25 0.20 2 40 0.10 3 50 0.16 Calculate the number of moles of nitric acid in each experiment. Give your answers to two decimal places.
(a)[1 mark]Experiment 1:
(b)[1 mark]Experiment 2:
(c)[1 mark]Experiment 3:
Question 6
1 mark · Easy
Answer and see the solution →The balanced equation for the reaction between hydrochloric acid and sodium carbonate is:
If 0.04 mol of sodium carbonate reacts completely, how many moles of hydrochloric acid are required to react with it?
Question 7
3 marks · Easy
Answer and see the solution →Zinc sulfate can be made by reacting zinc oxide with sulfuric acid as follows:
(a)[1 mark]25 cm³ of 0.20 mol/dm³ sulfuric acid is used in the reaction. Calculate the number of moles of sulfuric acid used.
(b)[1 mark]How many moles of zinc sulfate could be formed from this amount of sulfuric acid?
(c)[1 mark]Calculate the maximum mass of zinc sulfate, ZnSO₄ (Mᵣ = 161), formed.
Question 8
2 marks · Easy
Answer and see the solution →Calculate the number of moles of potassium chloride, KCl, dissolved in 15 cm³ of solution with a concentration of 0.25 mol/dm³.