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The pH at 25 °C of an aqueous solution of the sodium salt of β-naphthol (NaC10H7O)...

The pH at 25 °C of an aqueous solution of the sodium salt of β-naphthol (NaC10H7O) is 11.28. Calculate the concentration of C10H7O- in this solution, in moles per liter. Ka for HC10H7O is equal to 3.1×10-10.

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