The purpose of the iodimetric back titration, a form of redox titration, experiment is to determine the weigh percentage of ascorbic acid in Vitamin C tablets. The experiment is performed by titrating iodine solution that contains the dissolved ascorbic acid with sodium thiosulfate. The results of the titration was inconclusive, and the weight percentage of the ascorbic acid could not be determined. Several sources of error could explain the variation of titrated volume of sodium thiosulfate.
used in the experiment of Vit C estimation by back titration. VKI added to the solution/cm3 Concentration of KI added to the solution/M Volume of KIO3 added to the flasks ±0.08/cm3 Volume of H2SO4 added to the solution±0.08/ cm3 Concentration of H2SO4 added to the solution/M 15.0
Temperature and Environment in Which Commercial Orange Juice is Stored and its Effect on Ascorbic Acid Content with the Influence of Time XXXXXXX XXXXXX Candidate Number: 000166-XXX Seoul Foreign School, South Korea Word Count: 3772 May 2013 Exam Session 000166-XXX 1 Abstract Ascorbic acid, commonly known as vitamin C, is considered one of the most essential vitamins for our bodies. With the popular belief that ascorbic acid boosts your immune system, Koreans often search for orange juice and Jeju
Introduction: The presence of Vitamin C (Ascorbic Acid) in an individual’s diet is critical since humans, in fact, does not have the ability to synthesize them ourselves. Vitamin C is essential for human health. It is an antioxidant scavenger and it is also vital for tissue maintenance and repair. The lack of Vitamin C in one’s system can lead to numerous kinds of illnesses. For example, severe Vitamin C in a prolonged period can lead to scurvy. Vitamin C can be obtained from fruit, vegetables,
Analysis for Vitamin C Introduction Vitamin C, also known as ascorbic acid C6H8O6, is important because the body uses it in order to grow and repair tissues.1 Humans are unable synthesize vitamin C, therefore it is essential to consume the recommended daily amount around 60 mg/day.2 The goals of this lab were to determine the amount of vitamin C in a sample of apple juice. Also, another objective was to gain experience with redox reactions and titrations. “A titration is a method of analysis
Title : The Vitamin C content of fruit juice Aim : To investigate the vitamin C content of fruit juice. Introduction : [2]Vitamin C, also known as the ascorbic acid or the L-ascorbate, is required for the growth and repair of tissues in all parts of our body. It is necessary to form collagen, an important protein used to make skin, scar tissue, tendons, ligaments, and blood vessels. Vitamin C is essential for the healing of wounds as well as for the repair and maintenance of cartilage, bones
In this experiment redox-based titrimetric analysis was used to determine the amount of ascorbic acid (Vitamin C) contained in a serving of lemonade. This was done to confirm the 100 percent recommended daily allowance claimed on the package for a serving of Country Time Lemonade. The titration method used was adding a thyodene indicator to the analyte (lemonade solution) there is a visible colour change when the endpoint of the reaction between the titrant (KIO3) and the analyte occurs. The following
Introduction Vitamin C (ascorbic acid) is an essential nutrient used for the creation of certain biological compounds and is naturally found in citrus fruits. 1 Ascorbic acid has a chemical formula of C¬¬6H8O6 and reacts with Iodine to cause the reaction:2 C6H8O6(aq) + I2(aq) -> C6H6O6aq) +2I¬-(aq) + 2H+ To determine the amount of vitamin C an amount of KIO3 solution with a known concentration had it’s iodine “freed” with the chemicals KI and H2S04, this allowed the iodine to react with the dissolved
tablets by titration between vitamin C (ascorbic acid) & iodine solution. Hence, compare this data with the manufacturer 's specification. Principle In this analysis, certain amount of iodine solution, which is known in excess, is added to acidified ascorbic acid solution. Brown iodine can be easily reduced by acidified ascorbic acid to form colourless iodide ion: ← Equation I The excess iodine is then back titrated by standard sodium
prevents against illnesses such as scurvy, which was extremely prevalent amongst sailors due to the amount of time they spent away from land and most fruits, which would spoil on a ship. This only furthered my interest in the subject of vitamin C, or ascorbic acid, and as such, my IA became entirely about vitamin C, and the concentrations of it based on cooking method. In order to obtain good data, I quickly researched what fruits might have the greatest concentrations of vitamin C. I quickly came across