Measuring Rates of Reaction from a graph

• The rate of reaction is fastest at the beginning and slows down as the reaction progresses
• The graph plateaus once all of the reactants has been used up
• Tangent

  A straight line that just touches the curve and has the same gradient as the curve at that point
• Average / Mean Rate of Reaction

  • Quantity of reactants used up ÷ time taken
  • Quantity of products formed ÷ time taken
• Rate of reaction for a specific time

  1. Draw a tangent on the point you want to calculate
  2. Find the gradient ( change in y ÷ change in x )