Titrations and calculations

• What do titrations allow us to work out?

  The concentration of an acid or alkali
• What is the apparatus used in a titration experiment?

  • Pipette
  • Pipette filter
  • Conical flask
  • Burette
• Why is a pipette used?

  To accurately measure the volume
• Why is a pipette filter used?


  To use the pipette safely
• Why is the conical flask used?

  To contain the liquid from the pipette
• Why is a burette used?

  To add measured volumes of one reactant to another in the conical flask
• What is the method of titration?

  1. Add indicator to the conical flask
  2. Add the the acid to the alkali until it changes colour
  3. Note the final volume reading
• What is a titre?

  The difference between the reading at the start and the the final reading gives the volume of acid needed
• What is the mole calculation for solutions?

  Concentration in mol/dm3 = amount in mol/ volume in dm3
• What is a dm3?

  cm3/1000
• What can titrations give you the idea of?

  Which of the two solutions is more concentrated
• What does this calculation calculate?

  Concentration of the unknown solution

  
• What are you expected to calculate in the exam?

  Either the concentration or volume of a solution by using the data
• How do you work out the concentration of the solution?

  C= n/V
• What does the n represent in titration calculations?

  Mols
• What does the C represent in titration calculations?

  Concentration
• What does the V represent in titration calculations?

  Volume
• How do you calculate volume of a solution?

  V = n/C
• Where do you find the mol value for the titration calculations?

  The question or your results