Titration practical

• What volume of alkali is added to the conical flask?

  25 cm³
• What is the purpose of adding an indicator to the alkali?

  To visually signal the end-point of the reaction
• Where should the conical flask be placed during the titration?

  On a white tile
• What should be done with the burette before starting the titration?

  Fill it with acid and note the starting volume
• What should you do while adding acid from the burette to the alkali?

  Swirl to mix the solutions
• When should you stop adding acid during the titration?

  When the indicator first permanently changes colour
• What should be noted after reaching the end-point of the titration?

  The final volume reading of the burette
• What is the procedure for obtaining concordant titres in titration?

  • Repeat steps 1 to 5 of the titration
  • Ensure the results are close to each other
  • More accurate results are obtained by adding acid drop by drop near the end-point
• Why is it important to add acid drop by drop near the end-point?

  To achieve more accurate titration results
• Describe four steps needed to obtain accurate results

  • Make sure the burette is vertical.
  • Take the readings from the bottom of the meniscus.
  • Near to the end-point, rinse the inside of the flask with distilled water.
  • Add the acid drop by drop.
• Explain why a pipette is used to measure the alkali, rather than a measuring cylinder.


  The pipette allows the same volume of alkali to be added each time, helping to make the results repeatable