effects of concentration on rate

• What should you be able to describe by the end of this video?

  The effect of concentration and pressure on reactions
• What is the initial behavior of chemical reactions over time?

  They are rapid initially, then slow down
• What does collision theory state?

  Reactions occur when particles collide with energy
• What determines the rate of a chemical reaction?

  The frequency of successful collisions
• How does the number of reactant molecules affect reaction speed?

  More molecules lead to more collisions
• What is the relationship between concentration and reaction rate?

  • Higher concentration increases collision frequency
  • Rate of reaction is proportional to concentration
  • More particles lead to faster reactions
• Why do reactions stop eventually?

  All reactant molecules have run out
• How does doubling the number of particles in a container affect the reaction rate?

  The reaction rate will double
• What happens to the quantity of product when concentration increases?

  More product is formed at the end
• How does the graph of a higher concentration reaction differ from a lower concentration reaction?

  The line is steeper for higher concentration
• What are the key points about the effect of gas pressure on reaction rate?

  • Higher gas pressure increases collision frequency
  • Rate of reaction is proportional to pressure
  • Similar principles apply as with concentration
• What will the next video focus on?

  Investigating the effect of concentration
• Where can students find questions on concentration's effect on reaction rate?

  In the vision workbook linked above
• What should you be able to explain after watching the video?

  The effect of concentration and pressure on reactions