Topic 6- The rate and extent of chemical change:

Question 1

Equation for rate of reaction:

Answer 1

Amount of reactant used/time

Question 2

Collision theory:

Answer 2

Chemical reactions can only take place when reacting particles collide with eachother and with sufficient energy.

Question 3

Effect of changing concentration on an equilibrium:

Answer 3

• If the concentration of reactants increase: the equilibrium shifts toward the side of the products.
  ** This means that more product is formed.**
• If the concentration of products increase: the equilibrium shifts towards the side of reactants.
  This means that more reactant is produced.

Question 4

Effect of changing temperature on an equilibrium:

Answer 4

• Increase in temperature: equilibrium favours the endothermic reaction.
  The yield of the endothermic side increases
• Decrease in teperature: equilibrium favours the exothermic side
  The yield of the endothermic side increases

Question 5

Effect of changing pressure on an equilibrium:

Answer 5

• Increase in pressure: the equilbrium shifts to the side with the fewest gaseous molecules
• Decrease in the pressure: equilibrium will shift to the side with the most gaseous molecules