A 10.0 mL sample of acid will be added to the flask from this pipette.

We will titrate the acid with 0.100 M base.

A couple drops of phenolphthalein are added to the sample of HCl.

Let's titrate this 10.0 mL sample of HCl with 0.100 M NaOH using phenolphthalein as the indicator.