A scientist carries out a titration to determine the concentration of acid in a lemon juice sample. First, a known volume of aqueous lemon juice and a few drops of indicator are placed in a flask. The aqueous lemon juice is then titrated with $0.1\,\text{mol dm}^{-3}$ aqueous sodium hydroxide. Which piece of apparatus is used to deliver the aqueous sodium hydroxide into the flask?
- Aa burette
- Ba delivery tube
- Ca measuring cylinder
- Da volumetric pipette