14 – Investigating the Rate of Decomposition of Hydrogen Peroxide (LC 2027) (Leaving Cert Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What is the role of manganese dioxide in the decomposition of hydrogen peroxide?
What is the role of manganese dioxide in the decomposition of hydrogen peroxide?
It acts as a catalyst
What are the products when hydrogen peroxide decomposes?
What are the products when hydrogen peroxide decomposes?
Water and oxygen gas
How does the gas collection method measure oxygen volume?
How does the gas collection method measure oxygen volume?
By water displacement
Why is timing critical when adding the catalyst?
Why is timing critical when adding the catalyst?
Reaction begins immediately
Where should you read the volume from in the graduated cylinder?
Where should you read the volume from in the graduated cylinder?
Bottom of the meniscus at eye level
What causes the steep initial rise in the graph?
What causes the steep initial rise in the graph?
Plenty of hydrogen peroxide available
What does the flattening of the graph indicate?
What does the flattening of the graph indicate?
All hydrogen peroxide has decomposed
If 40 of oxygen is produced in 7 minutes, what is the average rate in /min?
If 40 of oxygen is produced in 7 minutes, what is the average rate in /min?
5.71
How does increasing temperature affect the reaction rate?
How does increasing temperature affect the reaction rate?
Increases molecular movement & rate
What effect does higher hydrogen peroxide concentration have?
What effect does higher hydrogen peroxide concentration have?
Sustains faster rates for longer
Why must all connections in the apparatus be secure?
Why must all connections in the apparatus be secure?
Gas leaks cause inaccurate measurements
How does the reaction rate change as the experiment progresses?
How does the reaction rate change as the experiment progresses?
It decreases over time
