Two drops of a weakly acidic indicator Hin (Ka = 1.0 x 10-9) where Hin is yellow and In is blue, are placed in 100.0 mL of 0.10 M HCI. a. State the initial color of the solution. Explain. b. The solution is titrated with a strong base, 0 10M NaOH. At what pH will the color change (yellowish to greenish yellow)? Justify your answer. c. What color will the solution be after excess base (200.0 mL NaOH) has been added? Explain. 3. A certain indicator has a pK. of 3.00. If the indicator solution changes color when 7% of the indicator has been converted into its conjugate base, determine the pH at which this change becomes visible.