Factors that Affect the Rate of Reaction (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
12 questions from this quiz
What are the three main conditions that affect the rate of reaction?
What are the three main conditions that affect the rate of reaction?
Temperature, pressure, concentration
What happens to particles when temperature is increased?
What happens to particles when temperature is increased?
They move faster with more energy
Why does increasing temperature increase the rate of reaction?
Why does increasing temperature increase the rate of reaction?
More frequent, forceful collisions occur
What happens to gas particles when pressure is increased?
What happens to gas particles when pressure is increased?
Squeezed closer together in smaller space
Why does increasing pressure speed up reactions in gases?
Why does increasing pressure speed up reactions in gases?
Particles collide more frequently
What does increasing the concentration of reactants mean?
What does increasing the concentration of reactants mean?
More particles in the same volume
How does increasing concentration affect collision likelihood?
How does increasing concentration affect collision likelihood?
Increases likelihood of collisions
In reactions with solids, which particles can collide with other reactants?
In reactions with solids, which particles can collide with other reactants?
Only particles on the surface
How can you increase the surface area of a solid reactant?
How can you increase the surface area of a solid reactant?
Break into smaller pieces or crush it
What does a higher surface area-to-volume ratio indicate?
What does a higher surface area-to-volume ratio indicate?
More particles available for collisions
What do catalysts provide to speed up reactions?
What do catalysts provide to speed up reactions?
Alternative pathway with lower energy
What happens to catalysts during a reaction?
What happens to catalysts during a reaction?
They are not consumed