Titrations

• What is a titrations used for finding out?

  The amount of acid needed to neutralise an amount of alkali
• How do you conduct a titration?

  • Use a pipette and pipette filler to add a set volume of alkali to a conical flask and 2 or 3 drops of indicator
  • Use a funnel to fill a burette with an acid with a known concentration below eye level
  • Record the initial volume of the acid
  • Use the burette to slowly add the acid to the flask while swirling it
  • The indicator changes colour once all the alkali has been neutralised
  • Record final volume of acid and use it to calculate the volume required to completely neutralise the alkali
• Which indicator turns pink in alkaline conditions?

  Phenolphthalein
• Do you need to repeat titrations many times?

  Yes
• Why do you not want universal indicator when doing a titration?

  You need an immediate colour change
• What indicator is colourless in acidic conditions?

  Phenolphthalein
• What colour is litmus paper in acidic conditions?


  Red
• What colour is methyl orange in acidic conditions?

  Red
• What indicator is blue in alkaline conditions?

  Litmus paper
• What indicator is yellow in alkaline conditions?

  Methyl organe