Factors that Affect the Rate of Reaction (Edexcel GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Which three main conditions affect the rate of reaction?
Which three main conditions affect the rate of reaction?
Temperature, pressure, concentration
What does collision theory explain?
What does collision theory explain?
How collision frequency & energy affect rate
Why does increasing temperature speed up reactions?
Why does increasing temperature speed up reactions?
Particles move faster, collide more often
What happens to particles when temperature decreases?
What happens to particles when temperature decreases?
They move slower, collide less often
How does increasing pressure affect gas reactions?
How does increasing pressure affect gas reactions?
Squeezes particles closer together
Why does higher concentration speed up reactions?
Why does higher concentration speed up reactions?
More particles in same volume
In reactions with solids, which particles can collide with reactants?
In reactions with solids, which particles can collide with reactants?
Only particles on the 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 mean?
What does a higher surface area-to-volume ratio mean?
More particles available for collisions
How do catalysts speed up reactions?
How do catalysts speed up reactions?
Provide pathway with lower activation energy
What happens to catalysts during a reaction?
What happens to catalysts during a reaction?
They are not consumed
What is the effect of decreasing pressure on gas reactions?
What is the effect of decreasing pressure on gas reactions?
Particles collide less often