Required Practical 3 - Effect of Temperature on Reaction Rate (AQA A-Level Chemistry): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What visual change indicates the reaction endpoint in this practical?
What visual change indicates the reaction endpoint in this practical?
Cross disappears due to sulfur
What concentration of sodium thiosulfate is used in this practical?
What concentration of sodium thiosulfate is used in this practical?
0.05 mol dm
What safety equipment is required when handling hydrochloric acid in this practical?
What safety equipment is required when handling hydrochloric acid in this practical?
Goggles, gloves, and lab coat
Why must this practical be performed in a well-ventilated area or fume cupboard?
Why must this practical be performed in a well-ventilated area or fume cupboard?
released is toxic
How much hydrochloric acid is added to sodium thiosulfate to start the reaction?
How much hydrochloric acid is added to sodium thiosulfate to start the reaction?
1 cm³
How long should sodium thiosulfate acclimate to a new temperature before repeating the test?
How long should sodium thiosulfate acclimate to a new temperature before repeating the test?
About 3 minutes
What is the minimum number of different temperatures that should be tested?
What is the minimum number of different temperatures that should be tested?
Five
What should be plotted against temperature to observe how the reaction rate changes?
What should be plotted against temperature to observe how the reaction rate changes?
1/time
What causes measurement errors when determining the reaction endpoint?
What causes measurement errors when determining the reaction endpoint?
Subjective judgement of disappearance
What improvement provides an objective method to determine when the solution reaches the endpoint?
What improvement provides an objective method to determine when the solution reaches the endpoint?
Employ a light sensor