A titration was carried out using 25.00 cm3 of 0.100 mol dm-3 propanoic acid with 0.100 mol dm-3 sodium hydroxide. The indicator phenolphthalein was used to determine the equivalence point. Phenolphthalein has a pH range of 8.3 to 10.0.
If hydrochloric acid was used instead of propanoic acid of the same concentration, which of the following would remain the same?
The volume of base needed to reach the equivalence point
The pH at the equivalence point
The y intercept on the pH curve
The colour of the solution just before equivalence had been reached
