SubjectCover

Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section

Calculations with equations involving solutions

19 practice questions

Start practising (8 questions)

Practice questions

1–8 of 8 · Normal

  1. Question 1

    2 marks · Normal

    Calculate the number of moles of potassium nitrate, KNO₃, in 25 cm³ of a solution with concentration 0.40 mol/dm³.

    Answer and see the solution →

  2. Question 2

    4 marks · Normal

    A reaction between barium chloride and sodium sulfate is shown by the equation:

    (a)

    Calculate the number of moles of Na₂SO₄ in 40 cm³ of solution with concentration 0.10 mol/dm³.

    [2 marks]
    (b)

    Use the balanced equation to determine the number of moles of BaCl₂ that react with this amount of Na₂SO₄.

    [2 marks]
    Answer and see the solution →

  3. Question 3

    3 marks · Normal

    What mass of magnesium sulfate, MgSO₄, is produced when 25 cm³ of 0.50 mol/dm³ sulfuric acid, H₂SO₄, reacts with excess magnesium oxide, MgO?

    (Ar: Mg = 24, S = 32, O = 16)

    Answer and see the solution →

  4. Question 4

    3 marks · Normal

    A student dissolves 0.015 mol of silver nitrate in 100 cm³ of water.

    Explain how to work out the concentration of this solution in mol/dm³. Show your calculation.

    Answer and see the solution →

  5. Question 5

    4 marks · Normal

    A student carries out a reaction between sodium hydroxide and hydrochloric acid:

    Results table
    ExperimentVolume of NaOH (cm³)Concentration of NaOH (mol/dm³)
    1200.25
    2150.25
    3250.50
    (a)

    For experiment 2, calculate the number of moles of NaOH used.

    [2 marks]
    (b)

    Using the equation, state the number of moles of HCl needed to react with the NaOH in experiment 2 and explain your answer.

    [2 marks]
    Answer and see the solution →

  6. Question 6

    1 mark · Normal

    Which of the following shows the correct mass of sodium chloride produced when 0.020 mol of hydrochloric acid, HCl, reacts with excess sodium hydroxide, NaOH? (Ar: Na = 23, Cl = 35.5)

    1. A.0.585 g
    2. B.1.17 g
    3. C.2.34 g
    4. D.0.2925 g
    Answer and check →

  7. Question 7

    2 marks · Normal

    Calculate the number of moles of copper(II) sulfate in 200 cm³ of solution with concentration 0.050 mol/dm³.

    Answer and see the solution →

  8. Question 8

    4 marks · Normal

    Potassium permanganate reacts with iron(II) sulfate as shown:

    (a)

    Calculate the number of moles of FeSO₄ in 50 cm³ of 0.20 mol/dm³ solution.

    [2 marks]
    (b)

    Use the equation to find the number of moles of KMnO₄ needed to react with this amount of FeSO₄.

    [2 marks]
    Answer and see the solution →