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An acid–base titration is described.

- 25.0 cm${^3}$ of dilute aqueous alkali is put into a conical flask.

- Indicator is added to the flask.

- Dilute acid is added to the aqueous alkali until the indicator changes colour.

- The volume of acid used is then recorded.

Which use of apparatus is correct?

1 ) 

The 25.0cm${^3}$ of aqueous alkali is measured using a volumetric pipette.

2 ) 

The 25.0cm${^3}$ of aqueous alkali is measured using the lines on the conical flask.

3 ) 

The volume of acid is measured using a measuring cylinder.

4 ) 

The volume of acid is measured using a volumetric pipette.

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