Question

HIn < === > H+ + In- he following absorbance data wereobtained for a 5.00 x 10-4 M solution of HIn in 0.1 M NaOH and0.1HCl. Measurements were made at a wavelength of 485 nm and 625 nmwith 1.00 cm cell.
0.1 M NaOH A(485 nm)=0.052, A(625 nm)=0.823
0.1 M HCl A(485 nm)=0.454, A(625 nm)=0.176
In the NaOH solution, essentially all of the indicator is presentas In-; in the acidic solution, it is essentially
all in the form of HIn.
What is the pH of a solution containing a small amount of theindicator that exhibits an absorbance of
0.530 at 485 nm and 0.216 at 625 nm (1.00 cm cells).
please solve step-by-step and explain.
i appreciate your help and time a lot!