7.1.2 Factors Affecting Rate of reaction

• What does the rate of reaction indicate?

  How quickly a chemical reaction occurs
• How can we measure the rate of reaction?

  By observing product formation or reactant disappearance
• What effect does higher temperature have on particles?

  It makes them move faster
• How does increased kinetic energy affect reaction rates?

  It leads to more frequent collisions
• How does boiling water illustrate the effect of temperature on reaction rate?

  Hotter water evaporates faster
• What is plotted on the x-axis?

  Time from start of reaction
• Why does increasing surface area increase reaction rate?

  It exposes more reactant particles for collision
• How can you differentiate between a fast and a slow reaction on the graph?

  • Fast reaction: Reaches the maximum product level in less time, with a steeper initial slope.
  • Slow reaction: Takes more time to reach the maximum product level, with a less steep initial slope.
• What analogy is used to explain faster reactions at higher temperatures?

  A faster car travels further in the same time
• Which reaction has a steeper initial slope?

  Fast reaction
• What does the y axis label 'Total mass / volume of product' suggest about the product?

  The product is either a solid or a liquid
• What does concentration refer to in a solution?

  Amount of substance dissolved in a liquid
• Why does higher concentration lead to a faster reaction rate?

  It leads to more frequent collisions between particles
• How does the graph indicate the rate of a reaction?

  Steeper slope equals faster rate
• What colors represent greater and lesser surface areas in the image?

  Dark purple for greater, light green for lesser
• How does surface area affect product formation in reactions?

  • Greater surface area allows faster product formation
  • More reactant particles are available for contact
  • Increases the likelihood of collisions
• What is the relationship between temperature and reaction rate?

  Higher temperatures increase reaction rates
• How does higher concentration affect particle collisions?

  It increases the frequency of collisions
• Which reaction reaches its endpoint faster?

  Fast reaction
• What is the definition of rate of reaction?

  • The speed at which a chemical reaction occurs
  • Can be fast or slow
• What are the key effects of temperature on reaction rates?

  • Higher temperature increases particle movement
  • Increases kinetic energy of particles
  • Leads to more frequent molecular collisions
  • Results in faster reaction rates
• What analogy is used to explain the effect of concentration on reaction rate?

  More cars on a highway increase collision chances
• How is the rate of reaction similar to the speed of a car?

  Both indicate how quickly something happens
• What does the flattening of the reaction line indicate?

  Reaction has reached completion
• What does a low rate of reaction represent?

  Slow formation of rust on metal
• What is the effect of catalysts on reaction rate?

  They increase the reaction rate
• What is the role of enzymes in the body?

  They act as catalysts for digestion
• What does the image illustrate about surface area and reaction rate?

  Greater surface area leads to faster product formation
• What analogy is used to describe activation energy in reactions?

  Like reducing the size of a hill
• How do catalysts affect activation energy?

  They lower the activation energy required
• What is plotted on the y-axis?

  Total mass/volume of product
• How does the concentration of vinegar affect the reaction with baking soda?

  • More concentrated vinegar results in quicker bubble formation
  • Higher concentration increases reaction speed
• What effect does increasing surface area have on reaction rate?

  It increases the reaction rate
• What is a catalyst?

  A substance that speeds up reactions
• What is the relationship between concentration and reaction rate?

  Higher concentration leads to faster reaction rates