CAIE IGCSE Chemistry 12.2 Acid–base titrations Question Bank

Practise interpreting acid-base titration procedures, apparatus choices and indicator evidence used to find neutralisation volumes.

Exam points

select burette, volumetric pipette and conical flask roles in a titration procedure
interpret indicator choice and colour change as evidence for the titration end-point

Covered syllabus points

12.2.1—An acid–base titration to include the 12.2.2—To identify the end-point of a

[Maximum number: 2]

(a)

Dilute sulfuric acid and aqueous sodium hydroxide can be used to prepare sodium sulfate crystals using a method that involves titration.

Figure for Question (a) — CAIE IGCSE Chemistry

[ 2 ]

(i)

Suggest why universal indicator is not suitable for this titration.

[ 1 ]

(ii)

Name an indicator that can be used in this titration.
$20.0 \mathrm{~cm}^{3}$ of dilute sulfuric acid neutralises $25.0 \mathrm{~cm}^{3}$ of $1.00 \mathrm{~mol} / \mathrm{dm}^{3}$ aqueous sodium hydroxide. At the end of the titration the conical flask contains aqueous sodium sulfate with the dissolved indicator as an impurity.

[ 1 ]

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Covered syllabus points

12.2 Acid–base titrations question 1

Question (a)

Question (i)

Question (ii)