conc.&reversible reactions

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

  The effect of change in concentration on a reversible reaction at equilibrium
• What happens to reactants and products in a sealed container during a reversible reaction?

  None of the reactants or products can escape
• What is the point called when the forward and reverse reactions occur at the same rate?

  Equilibrium
• What does a system at equilibrium do when changes are made to the conditions?

  The system responds to counteract the change
• What principle describes the response of a system at equilibrium to changes in conditions?

  Le Chatelier's principle
• What happens to the equilibrium when the concentration of $NO_2$ is increased?


  • The system is no longer at equilibrium
  • More $N_2O_4$ will be formed
  • Equilibrium will be re-established
• What occurs when the concentration of $N_2O_4$ is decreased?


  More $NO_2$ will react to form $N_2O_4$ until equilibrium is reached
• What happens when the concentration of $N_2O_4$ is increased again?


  • The system is no longer at equilibrium
  • More $NO_2$ will be formed
  • Equilibrium will be re-established
• Where can students find more questions on the effect of concentration on reversible reactions?

  In the revision world walk linked in the video
• What should students be able to describe after watching the video?

  The effect of changing concentration on a reversible reaction at equilibrium