Two drops of indicator HIn (Ka = 1.0 x 10^-9),where HIn is yellow and In- is blue, are placed in 100.0 mL of 0.10M HCl.
a) What color is the solution initially?
b) The solution is titrated with 0.10 M NaOH. At what pHwill the color change (yellowish to greenish yellow) occur?
c) What color will the solution be after 200.0 mL of NaOH hasbeen added?