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Explain collision theory by discussing factors such as particle density, collision frequency, kinetic energy, and activation energy.

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Cambridge IGCSE ChemistryChemical reactionsSupplement content

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Explain collision theory by discussing factors such as particle density, collision frequency, kinetic energy, and activation energy

This point belongs to Rate of reaction, especially Rate of reaction outcomes.
You need to be able to explain collision theory by discussing factors such as particle density, collision frequency, kinetic energy, and activation energy.
The key ideas to know are Describe and Explain.
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DescribeExplain

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Paper 4 structured question: Rate of reaction

Paper 4Theory (Extended)1 marks

Description

Factors Affecting Reaction Rates

Collision theory explains that the rate of a reaction depends on the frequency of collisions and the energy of the colliding particles. Factors such as temperature, concentration, and surface area can influence these aspects.

a
State one factor that affects the rate of reaction according to collision theory.
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Related learning objectives

Explain how the rate of a reaction is influenced by factors such as the concentration of solutions, pressure of gases, surface area of solids, temperature, and the presence of a catalyst or enzyme.
Rate of reaction outcomes
Recognize that a catalyst speeds up a reaction and remains unchanged after the reaction is complete.
Rate of reaction outcomes
Outline practical approaches to measure the rate of a reaction, such as monitoring changes in mass or gas production.
Rate of reaction outcomes
Analyze data, including graphical representations, from experiments related to the rate of reaction.
Rate of reaction outcomes
Discuss how factors like concentration, pressure, surface area, temperature, and catalysts affect reaction rates, using collision theory as a basis.
Rate of reaction outcomes

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