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

Titration

19 practice questions

Start practising (19 questions)

Practice questions

1–10 of 19

  1. Question 1

    1 mark · Easy

    Name the piece of apparatus used to deliver small, measured volumes of acid into a conical flask during a titration.

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  2. Question 2

    3 marks · Easy

    (a)

    State the colour change you would see when phenolphthalein is used as the indicator and the alkali in the conical flask is just neutralised by the acid from the burette.

    [1 mark]
    (b)

    Give one reason why phenolphthalein is preferred over universal indicator for titrations.

    [1 mark]
    (c)

    Name the flask used to hold the solution during a titration.

    [1 mark]
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  3. Question 3

    2 marks · Easy

    During a titration, a student records an initial burette reading of 6.40 cm³ and a final reading of 28.15 cm³. Calculate the volume of solution delivered from the burette.

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  4. Question 4

    2 marks · Easy

    Explain why titration readings should be recorded to two decimal places.

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  5. Question 5

    3 marks · Easy

    (a)
    Titration Results
    TitrationInitial burette reading / cm³Final burette reading / cm³
    10.7018.35
    21.4019.80
    32.0020.45

    Calculate the titre (volume delivered) for Titration 1.

    [1 mark]
    (b)

    Which titration is likely to be the rough (trial) titration? Give a reason for your answer.

    [1 mark]
    (c)

    Suggest why the average titre is calculated using only concordant results.

    [1 mark]
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  6. Question 6

    1 mark · Easy

    State the name of the procedure used to determine the volume of acid needed to neutralise a fixed volume of alkali.

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  7. Question 7

    3 marks · Easy

    (a)

    Describe how you would add the alkali during a titration to obtain an accurate result.

    [1 mark]
    (b)

    Explain why the conical flask should be swirled during the titration.

    [1 mark]
    (c)

    State how the endpoint of the titration is recognised.

    [1 mark]
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  8. Question 8

    2 marks · Easy

    A student starts a titration with the burette reading at 3.55 cm³. When the reaction is complete, the reading is 20.00 cm³. Calculate the volume of solution added from the burette.

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  9. Question 9

    2 marks · Normal

    State the piece of apparatus used to measure out a precise volume of liquid in a titration, and the apparatus used to hold the liquid that is being titrated.

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  10. Question 10

    4 marks · Normal

    A student wants to find out how much sodium hydroxide solution is needed to neutralise 25.0 cm³ of dilute hydrochloric acid using phenolphthalein as the indicator. Describe the main steps to carry out this titration accurately.

    (a)

    State the first step to prepare the acid sample for titration.

    [1 mark]
    (b)

    Describe how the student should handle the burette and indicator.

    [1 mark]
    (c)

    Explain how to know when the endpoint is reached and what to do as it approaches.

    [2 marks]
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