Required Practical 10a (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are the two medical uses of aspirin?
What are the two medical uses of aspirin?
Antipyretic & analgesic
What mass of salicylic acid is used in the synthesis?
What mass of salicylic acid is used in the synthesis?
6.00 g
At what temperature should the reaction mixture be heated during synthesis?
At what temperature should the reaction mixture be heated during synthesis?
Approximately 60°C
What volume of distilled water is used to precipitate the crude aspirin?
What volume of distilled water is used to precipitate the crude aspirin?
75 cm³
Why must the hot water bath not exceed 78°C during recrystallization?
Why must the hot water bath not exceed 78°C during recrystallization?
78°C is ethanol's boiling point
What is the melting point of pure aspirin?
What is the melting point of pure aspirin?
Around 135°C
What is the role of sulfuric acid in the synthesis?
What is the role of sulfuric acid in the synthesis?
Catalyst
What volume of ethanol is used for recrystallization?
What volume of ethanol is used for recrystallization?
15 cm³
What is the main hazard classification of ethanoic anhydride?
What is the main hazard classification of ethanoic anhydride?
Corrosive
What is the appearance of purified aspirin crystals?
What is the appearance of purified aspirin crystals?
White needle-like crystals