E20-1 Experiment 20 Consumer Chemistry: Vitamin C in Fruit Juices The Task The goal of this experiment is to determine the concentration of vitamin C in a range of different fruit juices (fresh and preserved) using titration and to rank these sources of vitamin C. Skills At the end of the laboratory session you should be able to: * use a pipette correctly‚ * use a pipette filler safely‚ * manipulate a burette and carry out a quantitative titration properly‚ * weigh a sample
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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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Research Question: How the amount of vitamin C in fruit juices affects its freshness and till what extent is the information provided on the pack by manufacturers is reliable? Background Information: Hypothesis: -fresh juices have more vitamin C than long-life -juice that is ‘not from concentrate’ is best in terms of vitamin content -if heat destroys vitamin C then heat-treated long-life juices will have lower concentrations -if heat destroys vitamin C then boiled fruit juice will have lower
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percentage of vitamin C (ascorbic acid ) between the fresh orange juice and artificial orange juice (Sunkist). Problem statement : Does have different types of fruit juice contain similar amount of vitamin c ? Objevtive: To analyse the concentration and percentage of different food sample by using titration method and state whether the percentage and concentration of vitamin C. Methodology: Theory : DCPIP can also be used as an indicator for Vitamin C. If vitamin C‚ which is a good reducing
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University of Phoenix Material Appendix C Models of Abnormality Psychologists use several different models to explain abnormal behavior. These different models have created shifts in values and beliefs as well as improvements in clinical research. These differences in ideas mean that the different models are sometimes in conflict with one another. People who follow one model often point out where another model fails in its interpretations‚ investigations‚ and treatment methods. Read the brief
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C# Programming C# Programming 1 Table of Contents 1. Strings‚ Exceptions‚ and Events The String Class Arrays Collections Overview of Exception Handling Throwing and Catching Exceptions .NET Framework Class Library Exceptions Creating Your Own Exceptions Events 2. Introduction to Windows Forms Introduction What Is a Form? Creating a Windows Form in a Text Editor Creating a Form in Visual Studio .NET The Windows Forms Designer Forms Form Properties Form Events Using Visual
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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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Section C (Edexcel IGCSE in English Language A) May 2010 Imagine that your school or college has been awarded a large sum of money to spend on improving facilities‚ and on increasing opportunities‚ for students. Write the text of a speech you might give to the Student Council‚ outlining your ideas on how the money should be spent. November 2009 “Schools are stuck in the past. They don’t adequately prepare young people for real life in the modern world.” Write about what you think schools
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Questions Google Search C++ Interview Questions C# Interview Questions C Interview Questions .........More pub-7003540323 ISO-8859-1 active GALT:#008000;G C ++ Aptitude Questions C Aptitude Questions 2 .........More 3422992112 ISO-8859-1 Aptitude Interview Questions 1 en Bottom of Form Tutorials C Tutorial C++ Tutorial C Aptitude Questions and Answers .........More Programming Source Codes C/C++ Source Codes C# Source Codes .........More
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Hepatitis C is a liver disease that is caused by hepatitis C virus. The virus enters into the liver cell‚ use the cell’s genetic to make copies of itself which then affects more cells. Causes Hepatitis C is usually transmitted through blood to blood contacts. It can be transmitted by sharing needles when injecting‚ toothbrushes and razors‚ tattoo or body piercing with equipment that has not been properly sterilized. It can also be sexually transmitted. It is not passed on by everyday contact
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