Rate of reaction+factors effecting them

• What does the rate of a chemical reaction measure?

  How fast reactants change into products
• What is the importance of reaction rates in the chemical industry?

  Faster reactions increase profit and efficiency
• What is an example of a slow reaction?

  Rusting of iron
• What is an example of a moderate speed reaction?

  Magnesium reacting with acid
• What is chemical weathering?

  Slow reactions like magnesium with acid
• How does burning compare to explosions in terms of reaction speed?

  Burning is fast, explosions are faster
• What does a steeper line on a reaction graph indicate?

  A faster rate of reaction
• What happens to the line on a reaction graph over time?

  It becomes less steep as reactants are used
• How can you find the speed of a reaction?

  By recording product formed or reactant used
• What do the slopes of graphs 2 and 3 indicate?

  Faster reactions with the same initial reactants
• What does graph 4 show compared to the others?

  More product and a faster reaction
• What is collision theory?

  It explains how reaction rates depend on collisions
• What factors affect the rate of a chemical reaction?

  Temperature, concentration, surface area, catalyst
• What happens to the energy of particles when temperature increases?

  Particles have more energy for successful collisions
• How does increasing temperature affect reaction rates?

  Particles move faster and collide more often
• How does increasing concentration affect reaction rates?

  More particles lead to more frequent collisions
• What effect does increasing pressure have on gas reactions?

  Particles occupy smaller space, increasing collisions
• How does increasing surface area affect reaction rates?

  More area allows for more frequent collisions
• What is a catalyst?

  A substance that speeds up a reaction
• What are enzymes?

  Biological catalysts in living organisms
• How do catalysts affect activation energy?

  They lower the activation energy needed
• What are the factors affecting the rate of reaction?

  • Temperature
  • Concentration of a solution
  • Surface area
  • Presence of a catalyst
• How does temperature affect the rate of reaction?

  • Increases particle movement
  • Leads to more frequent collisions
  • Increases energy of collisions
• How does concentration affect the rate of reaction?

  • More particles in the same volume
  • Increases frequency of collisions
• How does surface area affect the rate of reaction?

  • Smaller pieces increase surface area
  • More area for collisions
• How do catalysts work in reactions?

  • Speed up reactions
  • Not consumed in the reaction
  • Lower activation energy by providing alternative pathways
• What is the role of enzymes in biological reactions?

  • Act as biological catalysts
  • Speed up reactions in living organisms