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Potassium hydrogen phthalate (KHP, molar mass = 204.22 g/mol) is often used as a primary standard...

Potassium hydrogen phthalate (KHP, molar mass = 204.22 g/mol) is often used as a primary standard in acid-base titration. If 19.75 mL of NaOH is required to neutralize 0.397 g of KHP, what is the concentration of the NaOH?

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