Titrations

Question 1

Pipette?

Answer 1

Measures a fixed volume accurately

Question 2

Burette?

Answer 2

Measures a variable volume accurately

Question 3

What do titrations allow you to do?

Answer 3

Calculate the unknown concentration of a solution by the known concentration of another. You know the volume of both the acid and the alkali.

Question 4

How do you work out the moles of solution?

Answer 4

volume(dm3) X concentration(mol/dm-3)

Question 5

How do you get cm3 to dm3?

Answer 5

divide by 1000

Question 6

What should give you the same answer for the number of moles in the both the acid and the alkali?

Answer 6

volume X concentration

Question 7

How would you carry out a titration?

Answer 7

Fill a burette to 0.0 mark with alkali. Use a pipette to measure out a known volume of acid into a conical flask and add three drops of universal indicator. Place flask on white tile under burette and release the alkali slowly into the acid and indicator. When a colour change occurs, close the burette and read the volume of alkali needed to react with the acid.