CHEMISTRY 221 LABORATORY�QUANTITATIVE ANALYSIS EXPERIMENT: DETERMINATION OF ASCORBIC ACID IN VITAMIN C TABLETS THEORY: Ascorbic acid‚ C6H8O6‚ MM = 176.13‚ can be oxidized to form dehydroascorbic acid by bromine via the following reaction: The bromine or iodine used in the titration is generated by adding an excess amount of KBr or KI to an acidified solution of the sample according to the following reaction: BrO3- + 5 Br- + 6 H+ 3 Br2 + 3 H2O IO3- + 5 I- + 6 H+
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Hepatitis C has been referred to as a "Silent Epidemic‚" since it usually progresses slowly over many years. Most people who are infected with hepatitis C are not aware of any noticeable symptoms for as long as one to two decades after they are infected. In fact‚ by the time symptoms appear‚ the virus has probably already begun to damage the liver. If the liver is injured and stops functioning‚ death will always be the outcome (Lieber). Liver failure from chronic hepatitis C is one of the most common
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Determination of Ascorbic Acid in Vitamin C Tablets Done by: lora ID #: Date:12/3/2011 Objectives: The aim of this experiment is to determine the weight of ascorbic acid in three vitamin C tablets by titrating it directly with KBrO3‚ then back titration by Na2S2O3. Introduction: Vitamin C is a weak acid and a water soluble substance and it is often called ascorbic acid. It is useful for many biological activities and main functions such as: it is used to provide reducing equivalents for biochemical
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Getting Set Up - C++ Compilers The very first thing you need to do‚ before starting out in C++‚ is to make sure that you have a compiler. What is a compiler‚ you ask? A compiler turns the program that you write into an executable that your computer can actually understand and run. If you’re taking a course‚ you probably have one provided through your school. If you’re starting out on your own‚ your best bet is to use Code::Blocks with MinGW. If you’re on Linux‚ you can use g++‚ and if you’re on
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and Programming Spring Semester: 2010-2011 January 20‚ 2011 1. Write a program program in C++ to find the square of the numbers from 1 to 10 using : (a) for loop (b) while loop (c) do-while loop The output of the program should be in the following format: Number Square ……… ……… 2. Write a program in C++ that calculates the value of π from the infinite series [pic] Print a table that shows the value of π approximately by 1 term of the series
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perimeter of circle in c code. This c program makes a contrasting concept that how a return statement can return more than one value. Usually in C programming we make a call by value. This means that in general you cannot alter the actual arguments. But if desired‚ it can always be achieved through a call by reference. Using a call by reference intelligently we can make a function return more than one value at a time‚ which is not possible ordinarily. This is shown in the c program find area and perimeter
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demand and‚ on the other hand‚ it causes some significant losses both for the banking authority and traders. Electronic banking‚ on the other hand‚ solves the above problems. Furthermore‚ it opens up some other salient aspects such as increased foreign trade and foreign investment. 1.2 General problem statement Establishing Online banking infrastructure has been a challenging task for the developing countries like Bangladesh. At present‚ there is no infrastructure for performing Electronic-banking
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needs a daily intake of Vitamin C to stay healthy; therefore‚ one should be aware of what fruits he/she should ingest daily or more days to obtain stronger stamina and the abundance of antioxidants in the body to reverse oxidation. Vitamin C or L-ascorbic acid is essential for normal growth of humans and it helps in the repair and reconstruction of body tissues lost over time. It is an antioxidant that blocks the damage caused by free radicals. People who take Vitamin C daily tend to build up a great
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Analysis of Commercial Vitamin C Tablets Objective To employ titration technique to determine the content of vitamin C in commercial tablets using volumetric analysis and compare it with the manufacturers’ specifications. Introduction Deficiency of essential antioxidant Vitamin C in human will lead to scurvy. In this experiment‚ the vitamin C content of commercial tablets is determined and then compared with the manufacturers’ specifications. Vitamin C‚ ascorbic acid C6H8O6‚ reacts with
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88‚ d = 11. (b) a = −29‚ d = 9 (c) a = 58237‚ d = 58168 (actual question is a = 58237‚ d = 58168 ) Solution: (a) Because 88 = 11・8 + 0‚ we have q = 8‚ r = 0. (The fact that r = 0 says that 11|88.) (b) Because −29 = 9・(−4) + 7‚ we have q = −4 and r = 7. (Note that although we can write −29 =9・(−3) + (−2)‚ we cannot use −2 as r because r is not allowed to be negative.) (c) a = d(q)+r 58237 = 58168(1) + 69 Quotient = 1‚ Remainder = 69 (c actual) We do not need to perform
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