Titrations: making soluble salts
I can accurately perform a titration, understanding the apparatus and selecting a suitable indicator to identify the end point.
Titrations: making soluble salts
I can accurately perform a titration, understanding the apparatus and selecting a suitable indicator to identify the end point.
Lesson details
Key learning points
- Titration is a method used to completely neutralise an acid with a soluble base (alkali).
- Titrations are performed using strong acids and strong alkalis to accurately determine reacting volumes.
- Strong acids and alkalis are completely ionised in an aqueous solution.
- Each piece of apparatus in a titration has a specific and essential function.
- A suitable indicator (not universal indicator) is used to identify the end point of the titration.
Common misconception
Pupils often overshoot the end point, especially on their first attempt at a titration.
Pupils will need to work on their dexterity, often with a partner, to ensure the flow of titrant is slow enough from the burette, and that their swirling technique allows ample mixing of the solutions.
Keywords
Titration - a technique in volumetric analysis that is used to find the exact volumes of solutions that react with each other
Volume - how much 3D space matter occupies, it is often measured in cm³
End point - when just enough solution has been added from the burette to react with all the solution in the flask in a titration
Strong acid - strong acids ionise completely in water.
Meniscus - the curve that exists on the surface of a liquid when it is in a container
Equipment
burettes, volumetric pipettes/measuring cylinders, mini funnels, conical flasks, 0.1 M solutions of HCl and NaOH, white tiles, pipette fillers, phenolphthalein indicator
Content guidance
- Risk assessment required - chemicals
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
Exit quiz
6 Questions
Measures and dispenses precise volumes of acid or alkali.
Transfers a fixed volume of solution to the conical flask.
Holds the solution being titrated.
Shows when neutralisation is complete.