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IGCSE Cambridge Rates of Reaction
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  • Chemistry,
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  • Sixth Year / 12th Grade

This document contains all the concepts regarding Rates of reaction relevant to IGCSE CHEMISTRY 0620 syllabus. Key concepts includes factors affecting rates of reaction and activation energy etc.

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  • June 5, 2024
  • 4
  • 2023/2024
  • Class notes
  • Mr. xyz
  • All classes

Subjects

  • rates of reaction
  • speed of reactions
  • surface area
  • catalysts
  • concentration
  • enzymes
  • pressureofgases
  • measure of reaction
  • igcse chemistry
  • 0620
  • factors affecting speed of reaction

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  • Chemistry,
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RATES OF REACTION
(Cambridge IGCSE CHEMISTRY 0620)

NOTE: Please look at the figures at the end!



 Rates of Reaction
 The rate of a reaction refers to the speed at which reactants are converted into
products.
 It is a measure of how quickly a chemical process occurs and can be expressed
as the change in concentration of reactants or products per unit time.
 Mathematically, it can be represented as:




 Factors Affecting the Rate of Reaction
 Several factors influence the rate at which chemical reactions proceed, including:

 SURFACE AREA OF SOLID REACTANTS:
 Increasing the surface area of a solid reactant increases the rate of reaction. This
is because more particles are exposed to the other reactant(s), leading to a higher
frequency of collisions.
 For example, powdered calcium carbonate reacts faster with hydrochloric acid
than larger chunks because the powder has a greater surface area.

 CONCENTRATION:
 Increasing the concentration of reactants in a solution generally increases the rate
of reaction.
 A higher concentration means more particles per unit volume, which leads to an
increased likelihood of collisions.

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