Chem_Lab - Bench B2-5 Jenise Marte [email protected]..

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
September 26, 2006 Bench # B2-5 Jenise Marte [email protected] Abstract The amount of ascorbic acid in a tablet of Vitamin C and a sample of orange juice was determined through redox chemistry. KIO 3 was used in a titration with HCL solution to find the amount of ascorbic acid present. The amount of ascorbic acid in the Vitamin C tablet proved to be 0.96 g. The amount of ascorbic acid proved to be 0.00384 g. Keywords Ascorbic Acid (Vitamin C), potassium iodide, hydrochloric acid, potassium iodate, titration, molarity Introduction Since Vitamin C has such strong reducing properties, its content in a source can be determined through titration. In this case, titration was used as a procedure to determine the concentration of ascorbic acid—it’s ability to reduce iodine to iodide ions. To get the iodine, KI was reacted with KIO 3 in HCl. The I 2 was then reduced by the ascorbic acid. The excess I 2 at the end of the reaction will react with I - to form the I 3 - to form a starch. This starch is supposed to turn a dark blue, but in this case it turned a dark
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/08/2008 for the course CHEM 112 taught by Professor Jones during the Fall '07 term at Stevens.

Page1 / 4

Chem_Lab - Bench B2-5 Jenise Marte [email protected]..

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online