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30 mL of 0.05 M H2C2O4 added to 100 mL of 0.15M phenol solution (pKa= 9.98)....

30 mL of 0.05 M H2C2O4 added to 100 mL of 0.15M phenol solution (pKa= 9.98). Find pH of resulting solution.

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