Required Practical 2: Carrying out a Titration (Triple)

Question 1

What is the method for carrying out a titration?

Answer 1

1) First, use a pipette to transfer 25cm³ of sodium hydroxide solution into a conical flask.
2) Add 5 drops of methyl orange indicator to the alkali in the conical flask.
3) Place the conical flask on a white tile so we can see a colour change more clearly.
4) Fill a burette with sulfuric acid.
5) Add acid to the alkali until the solution is neutral. We need to add just enough acid for this to happen. Once we start to see a colour change, we now add the acid drop by drop until the solution is neutral. And it is important to swirl the solution to make sure the acid and alkali mix.
6) Read the volume of acid added from the burette from the bottom of the meniscus.
7) Repeat the titration till we get two readings within 0.1cm³.
8) Take a mean of these for the final volume.