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Learning objective

Explain why most collisions do not lead to reaction.

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Topic

Kinetics

Subtopic

Collision theory

Aqa A Level ChemistryPhysical chemistry

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Quick explanation

Explain why most collisions do not lead to reaction

  • This point belongs to Kinetics, especially Collision theory.
  • You need to be able to explain why most collisions do not lead to reaction.
  • The key ideas to know are collisions, lead, and most.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

collisionsleadmostreaction

Why it matters

This objective helps connect Collision theory to exam-style questions, flashcards, and revision notes for Kinetics.

Quick student answer

Which of the following factors does NOT affect the rate of a chemical reaction according to collision theory?

Direct answer

D) Color of reactants

Key terms

  • Effective collision: A collision between reactant molecules that results in a reaction due to sufficient energy and proper orientation.
  • Rate of reaction: The change in concentration of reactants or products per unit time.

Common trap

Confusing activation energy with overall energy change: Remember that activation energy is the energy needed to start the reaction, while the overall energy change is the difference between the energy of products and reactants.

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