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Phenolphthalein indicator is often used for HCl/NaOH titrations. The indicator turns faint pink with the first drop of excess base. Which

Phenolphthalein indicator is often used for HCl/NaOH titrations. The indicator turns faint pink with the first drop of excess base. Which statement(s) correctly explains this behavior? (choose all that apply)



A-The acidic form of phenolphthalein does not absorb visible light

B-The basic form of phenolphthalein does not absorb visible light

C-The basic form of phenolphthalein absorbs red/blue light

D-The acidic form of phenolphthalein absorbs yellow/green light

E-The basic form of phenolphthalein absorbs yellow/green light

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