Lab15 TITLE: Plan and Design OBSERVATION: Cooked vegetables have less Vitamin C (ascorbic acid) than uncooked vegetables. HYPOTHESIS: Heat speeds up the oxidation of vitamin C. AIM: To determine if heat speeds up the oxidation of vitamin C in broccoli APPARATUS AND MATERIALS: 2 broccolis‚ 1% dichlorophenolindophenol (DCIPIP)‚ an electric Masticating juicer‚ burette‚ water ‚ beakers‚ timer/ stopwatch‚ Bunsen burner‚ tripod‚ gauze‚ thermometer‚ 8 conical flasks‚ white tile‚ retort stand‚ funnel
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acid Aim: To determine the ascorbic acid content of canned apple and orange juice To determine the volume of canned juice necessary to provide 75mg of Vitamin C Introduction: For the estimation of ascorbic acid‚ the method used involved the titration of the ascorbic acid‚ in the presence of a redox indicator 2‚6-dichlorophenol-indophenol (DCPIP) which acts as both an oxidant so as to oxidise the ascorbic acid to dehydroascorbic acid‚ and it acts as an indicator to determine the end point of the
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the starch by using iodine test. 4) To test the presence of lipids in corn oils when using the Sudan Ш and Emulsion tests. 5) To test the presence of proteins in an egg albumen in the Biuret’s test. 6) To test the presence of Vitamin C and ascorbic acid in the DCPIP test. Results: Figure 1 :Results of biochemical test for different food samples in test tubes In test tube A‚ the Benedict’s test is used to test for the presence of reducing sugar which is glucose.This test gives the positive
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Quantitative - precise numerical value of the quantity Aims: 1) To learn how to carry out biochemical tests to identify biochemicals in pure form. 2) To learn the basis of biochemical tests. 3) To find out the concentration of ascorbic acid in a vitamin C solution. 4) To classify biochemical tests into qualitative‚ semi-quantitative & quantitative tests. 5) To learn how to use the correct significant figures for numbers calculated from experimental results. 6) To learn the meaning of some scientific
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1 Lifestyle‚ health and risk ■ HSW 1.1: Criterion 5 – Water as a liquid at room temperature Criterion 5: Analysis and interpretation of data to recognise correlations and causal relationships Consider the water molecule‚ its properties and its physical state. Water has a relative molecular mass (Mr) of only 18‚ yet it is a liquid at room temperature. This is surprising; it contrasts with other small molecules‚ which are usually gases at such temperatures. Examples include methane (CH4
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Acid Determination of Vitamin C Tablets and Salt Solutions Chem 1290-016 03-05-2010 ------------------------------------------------- Purpose: The purpose of this lab was to use acid-base titrations to find the mass percent of ascorbic acid in a Vitamin C tablet. A known concentration of sodium hydroxide was used and the value found was compared to the stated amount of ascorbic acid listed on the vitamin container. Also in this lab the acidity of different salt solutions were tested using
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Some cases Vitamin C has been proven harmful. The only reason we believe that Vitamin C is good for us in large doses is because of a man named Linus Pauling. Linus Pauling was an American chemist‚ biochemist‚ peace activist‚ author‚ and educator. He was the only person to receive two noble prizes by
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Hong Kong Diploma of Secondary Education Examination Biology and Combined Science (Biology part) School-based Assessment Sample Tasks Teachers may use the sample tasks for non-profit making educational and research purposes with proper acknowledgement. ©香港考試及評核局 保留版權 2009 Hong Kong Examinations and Assessment Authority All Rights Reserved 2009 HKDSE Biology SBA Practical Task: Topic: I (e) Presence of protease in pineapple and / or kiwifruit Scenario: Last week‚ Mary prepared some jelly
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中文網頁全球網頁不限時間一天內一星期內一個月內搜尋結果 Analysis of commercial vitamin C tablets free essay‚ term paper and book reportwww.freeessays123.com/.../analysisofcommercialvitaminctablets.html 網頁紀錄 - 更多此站結果Analysis of commercial vitamin C tablets Free Essays‚ Term Papers and book reports. Thousands of papers to select from all free. ... Analysis of commercial vitamin C tablets Free Essay‚ Term Paper and Book Report Objective To determine the vitamin C ... Analysis of Commercial Vitamin C Tablets. (Ascorbic acid content in one
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I. Title of experiment: Determination of Vitamin C in Tablets and Juices. II. Introduction: Ascorbic acid or vitamin C is the analyte of this experiment.It is the most appropriate vitamin used to treat colds.It acts as a natural antihistamine that reduces the severity of cold symptoms and it is also used for allergy control.It is an antioxidant and makes headlines when it comes to cancer prevention.Besides‚it helps
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