Question

an acid base indicator like bromocresol green is blue under basic conditions and yellow under acidic conditions. what would be a good methodology to quantify a substance of this sort which has general equilibrium as followed:
H2O +Hln <--> H3O +In (In is the indicator in equalibrium)
b) explain why a concentration > .01 M is a potential problem in using UV-vis absorption spectroscopy to determine concentration. c) explain why wavelength selection can be critical in the determine concentration using UV-vis spectroscopy