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A 40.0 mL sample of 0.400M NaOH is titrated with 0.200M HNO3 at 25 degrees C....

A 40.0 mL sample of 0.400M NaOH is titrated with 0.200M HNO3 at 25 degrees C. Calculate the pH when 40.0 mL of titrant has been added to the system.

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