Neutralisation / Titration
This practical lesson covers:
- How to determine the reacting volume of solutions of a strong acid and a strong alkali by titration
Investigating neutralisation reactions
Aim
To determine the reacting volume of solutions of a strong acid and a strong alkali by titration.
Background information
Neutralisation reactions occur when an acid reacts with an alkali. A titration is a practical technique that allows us to accurately measure how much acid is required to neutralise an alkali (or vice versa). In this practical, you will perform a titration to find the volume of sulfuric acid that is required to neutralise 25 cm3 of sodium hydroxide solution. You will then use the volume of sulfuric acid required to calculate the concentration of the sulfuric acid.
What is the purpose of the phenolphthalein indicator in the titration method?
to calculate the mean volume of acid added
to indicate the endpoint of the reaction
to measure the volume of acid added
to determine the concentration of the sulfuric acid
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What is the purpose of swirling the conical flask during the titration?
to calculate the mean volume of acid added
to indicate the endpoint of the reaction
to mix the contents of the flask
to determine the reacting volume of solutions
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Which substance is used to fill the burette?
water
sodium hydroxide solution
sulfuric acid
phenolphthalein indicator
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What is the aim of the titration method described?
to calculate the number of moles of sulfuric acid
to determine the reacting volume of solutions
to determine the concentration of sodium hydroxide
to calculate the mean volume of acid added
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Which solution is used as the strong alkali in the titration?
sulfuric acid
sodium hydroxide solution
phenolphthalein indicator
dilute sulfuric acid
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