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Chemistry practical

Acid–alkali titration

Titrate hydrochloric acid against sodium hydroxide until your titres agree, then calculate the acid’s concentration.

What you will do

  1. 01Fill the burette with the acid and read the scale at the bottom of the meniscus.
  2. 02Pipette 25.0 cm³ of sodium hydroxide into a flask and add a few drops of indicator.
  3. 03Do a rough titration quickly, then accurate titrations, adding the acid drop by drop near the end point.
  4. 04Repeat until two accurate titres agree within 0.10 cm³.
  5. 05Record every burette reading in the table and work out each volume used.
  6. 06Calculate the mean titre, the moles that reacted and the acid’s concentration.