Purpose: The aim of this experiment was to determine if an unknown supplied food acid is citric acid (triprotic) or tartaric acid (diprotic acid)…
The objective of the lab was to measure the % of NaCO3 in an Alka-Seltzer tablet in different measures of an acidic solution (Vinegar). Through understanding of stoichiometric relationships and limiting reactants, quantities of substances yielded or consumed in a reaction can be determined by analyzing the amount of material involved. A vinegar-water solution is employed in this experiment because a fixed amount of NaCO3 can be reacted in pure water, by manipulating the amount of vinegar in the dissolving solution, the amount of acid capable of reacting increases; resulting in a greater amount of NaCO3 reacted and greater generation of CO2. Percent by mass of NaCO3 that has reacted can be determined by using mass difference and dimensional analysis to relate the amount of CO2 produced to the amount NaCO3.…
Answer theses same questions for thiamin, riboflavin, niacin, vitamin B6, folate, vitamin C and vitamin E.…
Vitamins are primarily classified by solubility. Some vitamins are soluble in water and others are soluble in fat. “According to The National Institute of Health, the body needs 13 vitamins for normal health.” This includes vitamins A, C, D, E, K and the B complex vitamins, thiamine, riboflavin, niacin, pantothenic acid, biotin, B6, B12 and folate. Each of these vitamins provides a variety of functions to the body which can be obtained from a well balanced diet (Farris, 2012).…
The dilution was decreased to 1 μL UC/501 μL dH2O and had an absorbance of 0.089A (table 2). This solution had a slightly darker blue coloration, however it was still a light blue in color. The absorbance was taken two more times at this dilution resulting in an average absorbance of 0.097A (table 2). The concentration of Unknown C was determined to be 2.655 μg/mL using the formula, which was attained from the standard curve. The correct concentration of unknown C was found to be 1330.2 μg/mL or 1.3302 mg/mL, after accounting for the dilution…
Determining the Unknown Concentration of NaHCO3 (aq) Through Titration Introduction Titration is the accurate addition of a titrant- solution in a burette- into a measured volume of a sample (Kessel, 2003). There are many different types of titration, such as acid-base reaction, redox reactions, precipitation reaction and more (Dohrman). In this lab an acid base titration will be explored. In an acid-base titration, the concentration of an acid or base is unknown and is determined by the adding (from a burette) a solution of known concentration (titrant). Titration is used in many different fields such as medicine to determine different concentrations of chemicals in the blood.…
Chatterjea (2004). _Textbook of Biochemistry for Dental/Nursing/Pharmacy Students_. (pp. 50-52). Jaypee Brothers Publishers. Bottom of Form…
An organic dye, 2,6-dichloroindophenol (DCIP), is employed to titrate with the vitamin C in the extracted sample solution. The extracting solution is a mixture of metaphosphoic acid with acetic acid. This solution can stabilize the extracted vitamin C by preventing its oxidation. The DCIP will serve as the indicator as excess DCIP will turn the solution pink after passing through the end point.…
A popular over-the-counter cold remedy suggests that megadoses of vitamin C will help prevent or minimize the effects of the common cold. If the label on the vitamin C cold remedy package states that it contains 1,000 mg of vitamin C, how many grams of vitamin…
ABSTRACT: The purpose of this project was to determine the amount of calcium, iron and zinc present in an over the counter multivitamin. This mass was determined using atomic absorption spectroscopy (AAS) and X-ray fluorescence spectroscopy (XRF). For both analytical techniques, the method of standard additions was used to compensate for matrix effects. After result analysis, it was determined that neither analytical instrument was more effective in determining the amount of elements present in the multivitamin over the other. Each had its own elemental downfall. gkjkkkkkkkkkkkkkkk…
There are two different preparations (starch-iodine or indophenol) that may be used for the vitamin C indicator solution. Neither is more accurate than the other. The starch-iodine mixture is much cheaper. It can be made ahead and stored in a dark, cool place in two liter soda bottles and dispensed in liter containers at the lab stations. Both indicators vary from one preparation to the next; so an accurate measure of vitamin C is not really possible with this protocol. The results allow students to compare relative amounts of vitamin C present.…
The lab consists in determining the vitamin C concentration in a solution by a redox titration using iodine. Vitamin C (ascorbic acid) is a water-soluble, essential oxidant that plays a vital role in the protection of the body from infections and disease it is acquired from primary fruits and vegetables. With the use of different materials as natural orange juice, Tampico (chemical orange juice) and other solutions that contain vitamin C we will find the amount of vitamin C in each of these concentrations with the help of iodine, and with that data we can compare the difference that exist between the solutions and get to a conclusion of how the amount of vitamin C changes in both types of solutions.…
* Conduct multiple titrations to determine an average concentration of Vitamin C present in a fruit juice sample.…
Method to test hypothesis: The hypothesis can be tested by first determining the amount of ascorbic acid needed to decolourize 3mL of DCPIP solution, and calculating the concentration of Vitamin C in the ascorbic acid. Next, determine the amount of fruit juice needed to decolourize 3mL of DCPIP solution, and calculating the concentration of Vitamin C in the fruit juice initially. Then, heat a few test tubes of fruit juice in a boiling water bath for different periods of time- 3min, 7min, 11min, and 15 min. The test tubes should hold amounts of fruit juice that are more than the amount of fruit juice needed to decolourize 3mL of DCPIP initially. Take out the test tubes at the designated times and calculate their concentrations. Finally, the concentrations can be compared and the trend can be shown.…
4.675 x 10-4 mol KIO3 x (6 mol Na2S2O3 / 1 mol KIO3) = 0.002805 mol Na2S2O3…