Lab 10 - It took about the same amount of KIO3 to titrate...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Discussion 10: Oxidation of Vitamin C Part 1: The oxidation of Ascorbic Acid In part 1 of this experiment we were asked to find the experimental mass of ascorbic acid calculated from the moles of ascorbic acid we had. We took a sample of ascorbic acid and placed it in a flask and mixed it with HCl, KIO3, and H2O. The KIO3 served as an indicator. We stirred the mix until it turned blue. We had very accurate results. We started out with approximately .4 g of ascorbic acid and ended up with .327 g of experimental ascorbic acid. Part 2: The Effect of Temperature on Ascorbic Acid In Part 2 of this experiment we were asked to find the experimental mass of ascorbic acid just like in the first part, except this time we were required to heat the solution and boil it for 20 minutes. After boiling the ascorbic acid we let it cool and then titrated it.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: It took about the same amount of KIO3 to titrate the ascorbic acid as before and we had same initial mass as we did experimental mass. Therefore our conclusion was that heating the ascorbic acid had no effect on the mass of the ascorbic acid. Part 3: Analysis of Vitamin C Tablets In Part 3 of this experiment we were to dissolve vitamin c tablets in water and then titrate them just like the others. The only difference in this experiment and the previous two is that we were to find the percent of the tablet that was actually vitamin c. The initial mass of our tablet was .61 g and it only took 10 mL to titrate the solution. The final experimental mass of the vitamin c tablet was .528 g. This means that the percent of the tablet that was vitamin c was 86.6%. ERROR The errors that we encountered in this experiment were nonexistent....
View Full Document

This note was uploaded on 04/20/2010 for the course CHEM 1A/ 1 Chem Lab taught by Professor Van koppen during the Spring '10 term at UCSB.

Ask a homework question - tutors are online