*dilute a 7 M NaOH solution to 100.0 mL of approximately 0.7 M NaOH.

Then you will standardize the 0.7 M NaOH with KHP and titrate HCl to the phenolphthalein end point to determine the unknown HCl concentration. Save the remaining standardized NaOH to use for the vinegar titration.

*Also determine the mass of KHP required to neutralize 0.7 M NaOH.