To standardize a solution of NaOH, a student measured 0.326 g of potassium hydrogen phthalate (KHC8H404 or KHP) and dissolved it in 50.0 mL of water. To the solution, two drops of phenolphthalein indicator was added. To reach the equivalence point as indicated by endpoint of the titration where the solution retained a pale pink color, a volume of 15.3 mL was required. What is the molarity of the NaH solution?

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.