Estimating the Vitamin C Concentration in Fruit Juices: A Redox Titration Prelab Assignment – Please turn your answers in on GaView prior to lab 1. How will you prepare a .02% (m/v) NBS solution? Calculations should be in your notebook before arriving to lab. 2. Provide the structure of vitamin C in its reduced form (ascorbic acid)‚ its ionized form (ascorbate ion- this is at equilibrium with reduced form when dissolved)‚ and its oxidized form (dehydroascorbate). 3. Why do you
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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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Gagne’s Nine Events We are well aware of Gagne’s Nine Events of Instruction procedure. It was published as a part of ‘The Conditions of Learning’‚ back in 1965‚ but is still used and is applicable in today’s context. The events in this procedure are based on the internal and external cognitive factors that lead to learning. The learners’ prior knowledge forms the internal factors‚ whereas the external factors are the stimuli from the outside. The Nine-Events by Gagne are usually used in face-to-face
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A Critical Précis of "The Mystery of Persons and Belief in God by C. Stephen Evans 1. Name of author‚ title‚ appropriate publishing information‚ followed by a verb such as argues‚ believes‚ reports‚ and finally a "that clause containing the author’s thesis or major assertion. In "The Mystery of Persons and Belief in God" from the web site http://www.orgins.org/articles/evans_mysterypersons.html‚ C. Stephen Evans asserts that if we examine human nature and desires with a Christian mindset‚ we
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Vitamin C –A Natural Antioxidant Concept: Vitamin C (ascorbic acid) is an antioxidant. The amount of vitamin C content in food can be found out by titrating with an oxidising agent‚ e.g. iodine. In the reaction‚ vitamin C is oxidised‚ while iodine is reduced to iodide ions. The endpoint is determined by the formation of blue-black starch-iodine complex when all vitamin C is oxidised and excess iodine is free to react with the starch solution added as indicator. Introduction Vitamin C is an important
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wide range of base disciplines on which the strategy arguments are based‚ like for example economy‚ biology‚ anthropology‚ philosophy and politicology. Mintzberg emphasises this broad diversity of perspectives in the current debate and has identified nine main distinct schools in strategic thinking. Three of these schools – Design‚ Planning and Positioning School - are said to be prescriptive in nature and the other six schools – Entrepreneurial‚ Cognitive‚ Learning‚ Political‚ Cultural and Environmental
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orange juices‚ and we also used 0.1% of vitamin C solution. The aim of our experiment was to see how much DCPIP was needed to be added to make the orange juices turn back to the orange colour and the DCPIP to decolourise once the 0.1% of vitamin C was added. DCPIP is a blue dye in its non-reduced form; it becomes colourless when it gains electrons. Vitamin C is an anti – oxidant‚ this is found mainly in fresh fruit and vegetables. The main use of Vitamin C is that it neutralises free radicals‚ which
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Do you ever wonder what citizens in Afghanistan are going through‚ being controlled by the Taliban. And‚ how women have to fight for their rights to work because the main provider is deceased or still fighting in the war? In the book A Fort of Nine Towers‚ the main character Qais talks about the causes and affects of the ongoing war and how it effects his family.Further‚ he talks about the Taliban and the restriction they had‚ and how the Mujaheddin took over during the ongoing war. Through the
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373). Critical race theory is a notion that provides critical analyses on the subject of race‚ racism‚ and discrimination from a legal perspective. Specifically‚ she focuses on an ethnographic study that she has conducted at a high school’s ESL program. According to Malsbary
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