Question: a. Methyl orange (whose structure is given in Section 8.12) is an acid-base indicator. In solutions of it is red, and in solutions of PH

a. Methyl orange (whose structure is given in Section 8.12) is an acid-base indicator. In solutions of it is red, and in solutions of PH b. Phenolphthalein is also an indicator, but it exhibits a much more dramatic color change. In solutions of it is colorless, and in solutions of PH > 8.5 it is deep red-purple. Account for the change in color.

OH OH phenolphthalein 3-D Molecule: Phenolphthaleln

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