plotting reaction rates

• What are the steps to find the rate of reaction from a graph at a particular time?

  1. Draw a tangent to the curve at that time
  2. Find the gradient of the tangent
  3. The gradient equals the rate of reaction at that time
• Rules:

  •   The steeper the line, the faster the reaction.
  •   When one of the reactants is used up, the reaction stops (the line becomes stationary)
  •   The same amount of product → formed from the same amount of reactants, regardless of rate.
• gradient = difference in the amount of product formed OR reactant used / time 
• Graphs can be plotted to show the progress of a chemical reaction.