Factors that Affect the Rate of Reaction (Edexcel GCSE Chemistry Combined Science): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are the three main conditions that affect the rate of a chemical reaction?
What are the three main conditions that affect the rate of a chemical reaction?
Temperature, pressure, concentration
Why does increasing temperature increase the rate of reaction?
Why does increasing temperature increase the rate of reaction?
Particles move faster & collide more often
What happens to particle collisions when temperature is decreased?
What happens to particle collisions when temperature is decreased?
They collide less often & with less energy
How does increasing pressure affect the rate of reaction in gases?
How does increasing pressure affect the rate of reaction in gases?
Particles are closer, collide more often
What happens when you increase the concentration of reactants in a solution?
What happens when you increase the concentration of reactants in a solution?
More particles present, more collisions
Why does decreasing concentration slow down a reaction?
Why does decreasing concentration slow down a reaction?
Fewer particles available to collide
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 breaking a solid into smaller pieces affect the reaction rate?
How does breaking a solid into smaller pieces affect the reaction rate?
Increases surface area, faster reaction
What does a higher surface area-to-volume ratio mean for a reaction?
What does a higher surface area-to-volume ratio mean for a reaction?
More particles available for collisions
How do catalysts speed up chemical reactions?
How do catalysts speed up chemical reactions?
Provide pathway with lower activation energy
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
According to collision theory, what determines the rate of reaction?
According to collision theory, what determines the rate of reaction?
Frequency & energy of collisions