In the calculations it was assumed that: a. Before any acetic acid was added, essentially all the indicator was in the In-form.
b. After the HCl was added, essentially all the indicator was in the HIn form.

Required:
Justify these assumptions using the measured pH of these solutions and your experimental value for pKHIn to determine:

1. The fraction of the indicator in the HIn form in solution B before any of solution A was added.
2. The fraction of the indicator in the In- form after the HCl was added.