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Year 10 - Science

Titrations: making soluble salts

Making salts

Unit Summary

This unit explores empirical formulae, balanced chemical and ionic equations, gas identification, acid reactions, and pH as a measure of hydrogen ion concentration. It covers separation techniques and focuses on planning experiments, accurate measurements, safety, and communicating findings.

Lesson Summary

You will learn to accurately perform a titration, understanding the apparatus and selecting a suitable indicator to identify the end point.

Key Notes

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.

Vocabulary To Learn

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

Common Mistakes To Avoid

Pupils often overshoot the end point, especially on their first attempt at a titration.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key 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.

2. Define this scientific word and use it in context. 'titration'

a technique in volumetric analysis that is used to find the exact volumes of solutions that react with each other. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Pupils often overshoot the end point, especially on their first attempt at a titration. Correction: 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.

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