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Determination of Rate of Reaction

 
7.1  Determination of Rate of Reaction
 
Classification of Reactions
  • Fast reactions
  • Slow reactions
 
The image is an infographic titled ‘SLOW REACTIONS.’ It features a central light bulb icon with a checkmark inside, surrounded by five labeled processes connected by arrows in a circular flow. The processes are: 1. Food decay 2. Photosynthesis 3. Rock erosion 4. Fermentation 5. Corrosion of metals The background is white, and the text and icons are in shades of blue and red. The logo ‘Pandai’ is at the top left corner.
 
The diagram shows fast reaction such as fireworks, electric cell reactions, ignition of matches and combustion of gases.
 
Definition of Rate of Reaction
  • Definition: Change in quantity of reactant or product per unit time.
  • The rate of reaction is inversely proportional to the time of reaction.
  • \(\text{Rate of reaction} ∝ \dfrac{1}{\text{Time of reaction}}\)
  • The reaction with shorter time of reaction has a higher rate of reaction and vice versa.
 
Changes that Occur during Reactions
  • The rate of reaction can be measured by measuring the observable changes.
    • Reduction in the mass or concentration of reactant
    • Increase in mass or concentration of product
    • An increase in volume of gas released
    • Production of precipitate
    • Change of temperature, pH, electric conductivity or the intensity of the colour of the reacting mixture
 
Types of Rate of Reaction
  • The average rate of reaction
  • Instantaneous rate of reaction
 
Definition of Average Rate of Reaction
The speed of a reaction over a time interval.
 
Definition of Instantaneous Rate of Reaction
  • The rate of reaction that happens at any given time.
  • Obtained from the gradient of the tangent on the graph of change in the amount of reactant or product against time. 
 

 

 

 

 

 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.

Determination of Rate of Reaction

 
7.1  Determination of Rate of Reaction
 
Classification of Reactions
  • Fast reactions
  • Slow reactions
 
The image is an infographic titled ‘SLOW REACTIONS.’ It features a central light bulb icon with a checkmark inside, surrounded by five labeled processes connected by arrows in a circular flow. The processes are: 1. Food decay 2. Photosynthesis 3. Rock erosion 4. Fermentation 5. Corrosion of metals The background is white, and the text and icons are in shades of blue and red. The logo ‘Pandai’ is at the top left corner.
 
The diagram shows fast reaction such as fireworks, electric cell reactions, ignition of matches and combustion of gases.
 
Definition of Rate of Reaction
  • Definition: Change in quantity of reactant or product per unit time.
  • The rate of reaction is inversely proportional to the time of reaction.
  • \(\text{Rate of reaction} ∝ \dfrac{1}{\text{Time of reaction}}\)
  • The reaction with shorter time of reaction has a higher rate of reaction and vice versa.
 
Changes that Occur during Reactions
  • The rate of reaction can be measured by measuring the observable changes.
    • Reduction in the mass or concentration of reactant
    • Increase in mass or concentration of product
    • An increase in volume of gas released
    • Production of precipitate
    • Change of temperature, pH, electric conductivity or the intensity of the colour of the reacting mixture
 
Types of Rate of Reaction
  • The average rate of reaction
  • Instantaneous rate of reaction
 
Definition of Average Rate of Reaction
The speed of a reaction over a time interval.
 
Definition of Instantaneous Rate of Reaction
  • The rate of reaction that happens at any given time.
  • Obtained from the gradient of the tangent on the graph of change in the amount of reactant or product against time. 
 

 

 

 

 

 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.
Chapter : Rate of Reaction
Topic : Solve numerical problems based on the average and instantaneous rate of reactions
Form 4 Chemistry
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