13.1 – 13.4: Shifting Equilibria and Calculations

• How do you know which direction to reach the equilibrium of the reaction

  Compare Q to K
• If Q < k, that means...

  move forwards to products
• If q = k, that means...

  At equilibrium
• If Q > k, that means...

  Move backwards to reactants
• Large K = 


  products are favored
• Small k =

  reactants are favored
• What is Le Chatelier's Principle?

  If a system at equilibrium is subjected to stress, the position of the equilibrium will shift to relieve the stress
• Increase the amounts of reactants (Q<k) is shifted towards...

  products
• Increase the amount of products (Q>k) is shifted towards...

  reactants
• In exothermic rxns: How is temperature impacted...

  Temp goes up, shifts towards reactants (left)
• In endothermic rxns: Temp goes up which means...

  Shifts right to products
• In endothermic rxns: Temp goes down which means...

  shift left to reactants
• Are gas phase reactions impacted by total pressure?

  Yes
• Increasing pressure drives RXN to side with...

  fewer moles of gas
• What does RICE stand for in chemistry

  reaction, initial conditions, change, equilibrium