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A student neutralises an alkali with an acid in a titration experiment - OCR Gateway - GCSE Chemistry - Question 20 - 2020 - Paper 1
Question 20
A student neutralises an alkali with an acid in a titration experiment. (a) Complete the word equation for the reaction of an acid with an alkali. acid + alkali → +... show full transcript
Worked Solution & Example Answer:A student neutralises an alkali with an acid in a titration experiment - OCR Gateway - GCSE Chemistry - Question 20 - 2020 - Paper 1
Step 1
Step 2
Describe and explain one improvement the student should make to her method to get a more accurate titration result.
Answer
One improvement the student could implement is to use a single indicator, such as phenolphthalein, which provides a clear and distinct color change, making it easier to observe the endpoint of the titration.
Additionally, she should fill the burette exactly to the 0.0 cm³ line. This ensures that the volume of acid used is accurate, leading to reliable titration results.
Moreover, adding the acid slowly or dropwise near the endpoint will also contribute to more precise measurements, preventing overshooting the desired pH change.