Factors that Affect the Rate of Reaction (AQA GCSE Chemistry): Quizzes
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Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
Which three main conditions affect the rate of a chemical reaction?
Which three main conditions affect the rate of a chemical reaction?
Temperature, pressure, concentration
What happens to particles when temperature increases?
What happens to particles when temperature increases?
They move faster with more energy
Why does increasing temperature speed up reactions?
Why does increasing temperature speed up reactions?
More frequent and forceful collisions
What is the effect of decreasing temperature on reaction rate?
What is the effect of decreasing temperature on reaction rate?
Slows down the reaction
How does increasing pressure affect gas particles?
How does increasing pressure affect gas particles?
Squeezes them closer together
Why does increased pressure speed up reactions in gases?
Why does increased pressure speed up reactions in gases?
Particles collide more frequently
What does increasing concentration mean?
What does increasing concentration mean?
More particles in same volume
How does decreasing concentration affect reaction rate?
How does decreasing concentration affect reaction rate?
Slows down the reaction
Why do large solid chunks react slower?
Why do large solid chunks react slower?
Fewer particles exposed on surface
How can you increase the surface area of a solid?
How can you increase the surface area of a solid?
Break it into smaller pieces or powder
What does a higher surface area-to-volume ratio do?
What does a higher surface area-to-volume ratio do?
Speeds up the reaction
How do catalysts speed up reactions?
How do catalysts speed up reactions?
Lower activation energy pathway
What happens to catalysts during a reaction?
What happens to catalysts during a reaction?
They are not consumed