Factors that Affect the Rate of Reaction (AQA GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Which three are the main conditions that affect the rate of reaction?
Which three are the main conditions that affect the rate of reaction?
Temperature, pressure, concentration
What does collision theory explain about reaction rates?
What does collision theory explain about reaction rates?
Frequency and energy of collisions
What happens to particles when temperature is increased?
What happens to particles when temperature is increased?
They move faster with more energy
How does decreasing temperature affect collision frequency?
How does decreasing temperature affect collision frequency?
Particles collide less often
Why does increasing pressure speed up reactions involving gases?
Why does increasing pressure speed up reactions involving gases?
Particles are squeezed closer together
What happens when concentration of reactants in a solution increases?
What happens when concentration of reactants in a solution increases?
More particles in the same volume
In reactions involving solids, which particles can collide with other reactants?
In reactions involving solids, which particles can collide with other reactants?
Only particles on the surface
How does crushing a solid into powder affect the reaction rate?
How does crushing a solid into powder affect the reaction rate?
Increases surface area, faster reaction
What does a higher surface area-to-volume ratio mean for reaction rate?
What does a higher surface area-to-volume ratio mean for reaction rate?
More particles available, faster reaction
How do catalysts speed up chemical reactions?
How do catalysts speed up chemical reactions?
Lower activation energy pathway
What happens to a catalyst during a chemical reaction?
What happens to a catalyst during a chemical reaction?
It is not consumed in the reaction
Which change would cause the fastest reaction rate?
Which change would cause the fastest reaction rate?
Higher temp, higher concentration