6.1 Rate of reaction

• The rate of reaction measures how quickly a chemical reaction occurs
• A lower reaction rate signifies a slower reaction.


  True
• Order the factors affecting reaction rate from most significant to least significant (based on their effect):

  1️⃣ Temperature

  2️⃣ Concentration

  3️⃣ Surface Area

  4️⃣ Catalyst
• Measuring the change in volume of gaseous products is one method to measure the rate of reaction.
• Lower concentrations lead to more frequent collisions and a higher reaction rate.

  False
• How does increasing temperature affect the kinetic energy of particles?

  Increases kinetic energy
• Catalysts increase activation energy.

  False
• Arrange the reaction speeds from fastest to slowest based on their rates:

  1️⃣ Faster (Higher rate)

  2️⃣ Slower (Lower rate)
• Match the method with the factor it measures in reaction rates:

  Mass change ↔️ Change in mass of reactants or products

  Volume change ↔️ Change in volume of gaseous products

  Concentration change ↔️ Change in concentration of reactants or products

  Appearance of product ↔️ Time taken for a product to appear
• Higher concentrations provide more reactant particles per unit volume.
• A catalyst lowers the activation energy, enabling the reaction to proceed faster.
• What is the formula for calculating the rate of reaction?

  \text{Rate} = \frac{\text{Change in amount of reactant or product}}{\text{Time}}\end{latex>
• How does increasing the concentration of reactants affect the reaction rate?

  Increases the rate
• Why does a larger surface area increase the reaction rate?

  More reactive sites
• What does collision theory explain about reaction rates?

  Frequency of collisions
• What is the definition of activation energy?

  Minimum energy for reaction
• Larger surface areas expose more reactive sites.
• Catalysts lower the activation energy.
• Higher temperatures increase the kinetic energy of molecules.
• What does collision theory explain about reaction rates?

  Frequency and effectiveness of collisions
• How do catalysts increase the rate of reaction?

  Lower activation energy
• A higher reaction rate indicates a faster reaction
• A catalyst provides an alternative pathway with a lower activation energy.
• Higher temperatures increase the kinetic energy of reactant molecules, leading to more effective collisions.


  True
• Higher concentrations provide more reactant particles per unit volume.
• Catalysts lower the activation energy required for a reaction.
• What is activation energy in a chemical reaction?

  Minimum energy required
• How is the rate of reaction calculated?

  Change in amount / time
• Why does higher concentration increase reaction rate?

  More reactant molecules
• Higher temperatures lead to more effective collisions due to increased kinetic energy.


  True
• Catalysts are consumed during a chemical reaction.

  False