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Year 10 Rates of reaction quick check
By Phoenix Hoyle
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Last updated over 1 year ago
22 questions
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Question 1
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Step 1: draw a _______ at t = 3s
Step 2: calculate the _______ of the tangent using change in _______ (g) / change in _______
(s)
Rate = _______ g/s
(note the values are in mass not in moles so the axis is incorrectly labelled!
What is the rate of reaction at 3 seconds (1 Point)
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Question 20
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A gas syringe is better than collecting over water as the less _______ dioxide dissolves in the water.
Question 21
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This method of adding the acid to the marble chips is better as the _______ does not escape while the bung is being added.
Question 22
22.
If the water in the trough is saturated with sodium carbonate _______ dioxide will not dissolve.
The best explanation is:
Increasing concentration of a solution increases the rate of reaction as there are:
More collisions
More frequent collisions
Increasing pressure of a gas increases the rate of reaction as there are:
More collisions
More frequent collisions
Increasing surface area to volume ratio of a solid increases the rate of reaction as there are:
More frequent collisions
More collisions
The rate of reaction for a powder is greater than the rate of reaction for small chips as there are:
More collisions
More frequent collisions
As a reaction proceeds, the rate of reaction decreases and the slope of the tangent:
Increases (gets steeper)
Decreases (gets shallower)
When one of the reactants is used up, the slope of the line (on a graph of concentration vs time):
Becomes horizontal
Becomes vertical
(Decreasing the rate of reaction means less frequent and/or fewer successful collisions).
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Hint think of enzymes in biology
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Why does the powdering of calcium carbonate increase the rate of its reaction with an acid?
It increases the mass of calcium carbonate.
It increases the surface area to volume ratio of the calcium carbonate.
The powder becomes more concentrated.
The powder floats on top of the acid.
Why does the powdering of calcium carbonate increase the rate of its reaction with an acid?
There are more frequent collisions.
There are more forceful collisions.
The activation energy is decreased.
The proportion of successful collisions increases.
Hint look at the state symbols
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