CAIE IGCSE Chemistry 12.2.1 An Acid Base Titration to Include the Questions

Work through real CAIE IGCSE Chemistry questions to choose burettes, volumetric pipettes and indicators in titration experiments.

Exam points

describe the titration sequence using a volumetric pipette, burette, conical flask and indicator
identify a burette as the apparatus for adding and measuring variable acid volume
identify a volumetric pipette as the apparatus for delivering a fixed alkali volume
select a suitable acid-base indicator and recognise the endpoint colour change

[Maximum number: 1]

An acid-base titration is described.
- $25.0 \mathrm{~cm}^{3}$ of dilute aqueous alkali is put into a conical flask.
- Indicator is added to the flask.
- Dilute acid is added to the aqueous alkali until the indicator changes colour.
- The volume of acid used is then recorded.

Which use of apparatus is correct?

The $25.0 \mathrm{~cm}^{3}$ of aqueous alkali is measured using a volumetric pipette.

The $25.0 \mathrm{~cm}^{3}$ of aqueous alkali is measured using the lines on the conical flask.

The volume of acid is measured using a measuring cylinder.

The volume of acid is measured using a volumetric pipette.

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CAIE IGCSE Chemistry 12.2.1 An Acid Base Titration to Include the Questions question 1