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Question: complete these exercises after reading the experiment but before coming...

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Complete these exercises after reading the experiment but before coming to the laboratory to do it. The data graphed in Figure 11.1 were collected for the indicator phenolphthalein. This indicator is colorless at intermediate pH values and becomes magenta at high pH. The absorbance spectra of a series of solutions of phenolphthalein at different pH values is shown in the figure. 06 Figure 11.1 Changes in the absorbance spectrum of phenolphthalein at different pH values 1. For the four intermediate pHs in the graph, determine the value of the fractional ioniza- tion a of HA pHs listed. Use these values to determine four independent values for Ka. Present your data by filing in the following table. 1138 (pure base)

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