Titration/practicals

Question 1

Suggest why a stopper needs to be put in the conical flask as quickly as possible-

Answer 1

To reduce the escape of the gas

Question 2

Explain the method of titration-

Answer 2

Use a pipette and pipette filler to take 25cm3 sodium hydroxide and place it into a conical flask.
Place the conical flask on a white tile and the tip of the burette needs to be inside the conical flask.
Place a few drops of a suitable indicator inside the solution in the flask.
Perform rough titration and take burette readings, and swirl the flask vigorously.
Quickly close the tap if you were to observe a sharp colour change and record the volume in which the colour changes.
Now repeat the titration with a fresh batch of sodium hydroxide.