Aim This experiment is to determine the vitamin C content in different brands of processed fruit juices. Hence‚ compare the vitamin C content in the experimental results with the manufacturer’s claim and to find out the best buy. Principle Vitamin C (ascorbic acid) is a reducing agent‚ the vitamin C content of processed fruit juices can be determined by oxidizing ascorbic acid‚ C6H8O6 to dehydro-L-ascorbic acid‚ C6H6O6. A reagent that is particularly good for the oxidation is an aqueous solution
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experiment 1 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
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creation of a proper mental image of the dark night. Again Whitman reiterates the darkness by saying‚ “… great cloud darkening…dirges through the night…” (Whitman 34-40). He chooses to use “darkening” to show that the cloud looming over them is casting a heavy shadow over the people. “Dirges” are used in place of songs in order to convey the mournful demeanor of the music that was played. Whitman makes use of diction by choosing words that have a certain solemn connotation in order to create a dark
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investigate the vitamin C content of different fruit juices. To identify which fruit juices has higher vitamin C content and the lowest vitamin C content. To determine the standard curve of vitamin C based on percentage of vitamin C. To differentiate between fresh juices and carton juices. To consider the reliability and validity of the results. PROBLEM STATEMENT Which type of fruit juices has the most vitamin C content? HYPOTHESIS The smaller the amount of the fruit juices to decolourise
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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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tamin C‚ ascorbic acid‚ is one of the most important vitamins found in citrus juices‚ including orange juice. Often projects find that orange juices made from frozen concentrated orange juice (FCOJ) have the highest vitamin C levels as compared to freshly squeezed or not-from-concentrate (NFC) juices. This is probably due to the fact that vitamin C degrades over time in fresh and NFC‚ but doesn’t degrade as much in FCOJ due to it being frozen until reconstitution. If one is comparing a NFC product
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Electrolyte Challenge Sport Drinks vs. Orange Juice By: Clem L. Vinegar Jr. Mr. Wells February 2‚ 2013 I. Project Question- The question I am trying to answer is which drink between water‚ Gatorade‚ propel‚ PowerAde‚ and a homemade drink. II. Hypothesis- My hypothesis is that orange juice will have more electrolytes than the other drinks because of the natural electrolytes it contains from oranges. I also think that Gatorade will be the most preferred drink
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THE VITAMIN C CONTENT OF FRUIT JUICE Aim: To investigate the vitamin C content of fruit juice.Hypothesis: I believe the more drops of fruit juice taken to decolourise DCPIP‚ the smaller the amount of vitamin C in that fruit juice. This is because DCPIP needed to be decolourised by ascorbic acid in fruit juice‚ so less concentration of ascorbic acids means that more ascorbic acids is needed to decolourised DCPIP. I believe that freshly squeezed orange is going to have the most Vitamin C content
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: THE VITAMIN C CONTENT OF FRUIT JUICES AND TABLETS DATE OF EXPERIMENT : 1ST AUGUST 2013 DATE OF SUBMISSION : 27TH AUGUST 2013 LECTURER : PUAN ZAKIAH BT. ZAKARIA OBJECTIVE * To determine the vitamin C content in fresh fruit juice * To determine the vitamin C content in commercial fruit juice * To determine the vitamin C content in tablet
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decreased the heart rate of Daphnia. To determine this you need to test this hypothesis practically; in order to do this you have to make up a range of caffeine solutions of different concentrations; this is the independent variable – the thing that you change during the investigation. You also need a control variable‚ which would be a solution which has no caffeine in at all‚ to compare the results from the caffeine solutions. In addition to this‚ you need a dependent variable; this is what you measure
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