What is the concentration of a sodium hydroxide solution if 0.2033 g of potassium hydrogen phthalate…

What is the concentration of a sodium hydroxide solution if
0.2033 g of potassium hydrogen phthalate (KHP- MW 204.22 g/mol)
requires 10.40 mL of NaOH
solution to reach the phenolphthalein end point?
Answer with three decimal places.