Determine the concentration of 15 mL of an unknown acid based on the following titration data. Thirty milliliters of 0.3 M NaOH is used to bring the titration to its end point.

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.