Astandard solution is prepared by dissolving 10.6192 g of (nh4)2ce(no3)6 (548.23 g•mol-1, 98.75% purity) in dilute sulfuric acid. the resulting solution is quantitatively transferred to a 500.0-ml volumetric flask and diluted to the mark. what is the ce concentration in the final solution?

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.