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Preparing an alkali for titration
A student does a titration to find the volume of acid needed to neutralise an alkali. The student fills a burette with the acid.
Give three more steps the student must do before adding the acid to the alkali from the burette. You should name any equipment used.
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Marking points
- 1 Includes using a volumetric pipette to transfer the alkali.
- 2 Includes one credited additional preparation step.
- 3 Includes a second distinct credited additional preparation step.
Full-mark answer
1. Use a volumetric pipette to transfer a measured volume of the alkali into a conical flask. 2. Add a few drops of a suitable indicator to the alkali. 3. Record the initial burette reading.
Why this answer loses marks
Rinse the burette, then start adding acid.
The burette is already filled; prepare a measured alkali sample and distinct pre-release setup details.