Core practical - Rate of reaction (AQA GCSE Chemistry): Quizzes
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Practise the questions
14 questions from this quiz
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Practise the questions
14 questions from this quiz
What does this experiment investigate about chemical reactions?
What does this experiment investigate about chemical reactions?
How concentration affects rate
What type of reaction occurs between sodium thiosulfate and hydrochloric acid?
What type of reaction occurs between sodium thiosulfate and hydrochloric acid?
Precipitation reaction
What colour precipitate forms during this reaction?
What colour precipitate forms during this reaction?
Yellow sulfur precipitate
What volume of sodium thiosulfate solution is measured in Step 1?
What volume of sodium thiosulfate solution is measured in Step 1?
What volume of dilute hydrochloric acid is used in the experiment?
What volume of dilute hydrochloric acid is used in the experiment?
When should you stop the timer during this experiment?
When should you stop the timer during this experiment?
When you can no longer see the cross
How do you create different concentrations of sodium thiosulfate?
How do you create different concentrations of sodium thiosulfate?
By mixing it with water
Why must the experiment be done in a well-ventilated room?
Why must the experiment be done in a well-ventilated room?
Sulfur dioxide causes breathing issues
What happens to reaction rate when sodium thiosulfate concentration is higher?
What happens to reaction rate when sodium thiosulfate concentration is higher?
Rate becomes faster
When sodium thiosulfate is more dilute, how does the cross disappear?
When sodium thiosulfate is more dilute, how does the cross disappear?
Slowly
Why does higher concentration lead to faster reactions?
Why does higher concentration lead to faster reactions?
More frequent collisions occur
What is the independent variable in this experiment?
What is the independent variable in this experiment?
Concentration of sodium thiosulfate
What is the dependent variable in this experiment?
What is the dependent variable in this experiment?
Time taken for cross to disappear
How can you reduce uncertainty in your timing measurements?
How can you reduce uncertainty in your timing measurements?
Take repeat measurements & average