[SOLVED] Determination of Vitamin C I'm a little stuck on getting started on the calculations of a recent redox titration lab that I did, and was wondering if anybody could help me out. First I dissolved a 250 mg tablet of vitamin c in 50 mL distilled water. Then, I prepared a buret with 0.002034M KIO3 solution Next, I pipetted 5.00 mL of the vitamin c solution into a flask and added 5 mL of 0.6M KI solution, 5 mL of 1M HCl, 1 mL startch indicator solution. The endpoint was reached after 11.27 mL of KIO3 was titrated into solution. The question that I'm having trouble with is: From the volume of titrant added, calculate the moles of vitamin C for each titration. I know the molarity of KIO3 is 0.002034 mol/L. Therefore, M=n/v n=2.2923 x 10^-5 Would this also be the amount of moles of vitamin c? Or am I way off base? Can anybody please lead me in the right direction?