RP9 acid-base titration

• a suitable indicator for a titration is one which changes colour in the part of the pH against volume graph that is a vertical straight line
• method to obtain data to plot a graph of pH against volume:

  • place a fixed volume of acid/base in a beaker
  • add base/acid in small portions from a burette
  • stir and use a pH meter to record pH after each addition of acid
• a burette is more suitable for measuring the volume of the solution that is being added than a pipette because a burette can deliver variable volumes