Acid%20Base%20Titration

1
Acid Base Titration

• Laboratory Procedure

2
Aims

• To determine the unknown concentration of the
  Hydrochloric Acid by standardized sodium
  hydroxide solution

3
Laboratory Procedure
4

• Wash all glassware with water and then with
  de-ionized water

5

• Fill up the burette with hydrochloric acid.
  Remove any bubbles from the tip of the burette

6

• Then take an initial volume reading and record it
  in your notebook. Before beginning a titration,
  you should always calculate the expected
  endpoint volume.

7

• Pipette an suitable volume of standardized sodium
  hydroxide solution.

8

• Transfer the solution to the conical flask

9

• Add methyl orange indicator to the flask, then
  begin stirring.

10

• Deliver titrant to the sodium hydroxide solution
  in the conical flask.

11

• When approaching the endpoint, deliver the
  titrant more slowly and watch the colour of your
  flask carefully. Use a wash bottle to rinse the
  sides of the flask and the tip of the buret, to
  be sure all titrant is mixed in the flask.

12

• Add the titrant drop by drop until the colour
  change from yellow to orange.

13

• When you have reached the
  endpoint, read the final volume
  in the buret and record the final volume.