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A sample of solid potassium hydroxide contained soluble, unreactive impurities - Edexcel - GCSE Chemistry - Question 10 - 2021 - Paper 1
Question 10
A sample of solid potassium hydroxide contained soluble, unreactive impurities. A student tried to find the mass of potassium hydroxide in the sample, using the fol... show full transcript
Worked Solution & Example Answer:A sample of solid potassium hydroxide contained soluble, unreactive impurities - Edexcel - GCSE Chemistry - Question 10 - 2021 - Paper 1
Step 1
Suggest three ways to improve this method to obtain a more accurate mass of pure potassium hydroxide.
Answer
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Make the potassium hydroxide solution using a volumetric flask to ensure precise measurement of solution volume.
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Use distilled or deionized water to make up the solution, avoiding impurities that could affect the results.
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Conduct the titration using a pipette to measure the sulfuric acid dropwise only near the endpoint to prevent overshooting the end point.