4) Thymol blue (abbreviated H₂In) is a diprotic indicator with pKa1 = 2.0, pKa2 = 8.5. H₂In is red, HIn is yellow, and In is blue. What color will a solution with thymol blue in it be at each of the following pH values? Show your work or provide an explanation for each determination. a) pH = 1.0 b) pH = 2.0 c) pH = 7.0 d) pH = 8.5 (1 pt each)

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