“Pineapple peelings as vinegar” “Pineapple peelings as vinegar” *Abstract*- The pineapple ( Ananas comosus) is a tropical plant and fruit (multiple)‚ nativeto Uruguay‚ Brazil‚ and Paraguay. It is a medium tall (1±1.5m) Herbaceous perennialplant with 30 or more trough-shaped and pointed leaves 30±100 cm long‚ surrounding at hick stem. The pineapple is an example of a multiple fruit: multiple‚ spirally-arranged flowers along the axis each produce a fleshy fruit that becomes pressed against the
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Chapter 13: EDTA titrations Complexation Reaction: A reaction between two species having a well-defined stoichiometry. The resulting bond is not permanent from a covalent standpoint. Complex: The resulting structure formed during a complexation reaction. Coordination Center: Metal ion in a complex (Lewis acid) Ligand: The species that complexes the metal center. A single species can form one or more bonds with a single coordination center (Lewis base) Coordination Number: Number of ligand bonds
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EXPERIMENT 4: BACK TITRATION CONTENT NO. CONTENT PAGE 1. Synopsis 3 2. Introduction 3 3. Theory 4 4. Procedure 4 5. Results and Calculations 5 – 6 6. Discussion 7 7. Conclusion 7 8. References 8 1. SYNOPSIS The purpose of this experiment is to use the back titration method to determine the percentage of calcium carbonate in toothpaste. Instead of using standard titration methods where an acid is titrated directly using a standard solution of a base‚ back titration is used because
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being dropped into the vinegar there wasn’t a color change‚ however when the solutions came close to full titration‚ the solution would turn pink and once mixed would turn clear again | | 0.90 | 2.30 | 1.4 | | | 2.30 | 3.20 | 0.9 | | | 3.20 | 4.10 | 0.9 | | Bromothymol Blue | 8.00 | 9.50 | 1.5 | Solution turned from yellow to light green | | 9.50 | 11.10 | 1.6 | Solution turned from a bright yellow to bright blue rather than a light green indicating over-titration had occurred |
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samples of vinegar if any had been watered down‚ to complete this task a sample of commercial vinegar was tested twice using titration and an average was taken of the two samples to give a base line to compare the potentially tampered samples against. Introduction Vinegar is a solution made from the fermentation of ethanol (CH3CH2OH)‚ which in turn was previously fermented from sugar. The fermentation of ethanol results in the production of acetic acid (CH3COOH). The typical pH of vinegar ranges anywhere
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by Redox Titration with Iodine Vitamin C (ascorbic acid) is an antioxidant that is essential for human nutrition. Vitamin C deficiency can lead to a disease called scurvy‚ which is characterized by abnormalities in the bones and teeth. Many fruits and vegetables contain vitamin C‚ but cooking destroys the vitamin‚ so raw citrus fruits and their juices are the main source of ascorbic acid for most people. One way to determine the amount of vitamin C in food is to use a redox titration. The redox
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Titration for Acetic Acid in Vinegar Purpose: The Primary Purpose of this Experiment is to Determine the Percent Content of Acetic Acid in a Household Bottle of President’s Choice Vinegar‚ using Titration Techniques. In addition‚ a Secondary Purpose for this Experiment that Derives Directly from the Primary Purpose is to Gain Hands On Experience in Titration Techniques‚ as a Vital Tool in our Quest to Understanding the Chemical Aspect of the World around Us. Procedure Conducting a Titration
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Communities. N.p.‚ n.d. Web. 28 May 2010. <http://cnx.org/content/m17138/latest/>. 3. "Phenolphthalein." Digipac Microcomputer Software. N.p.‚ n.d. Web. 28 May 2010. <http://digipac.ca/chemical/equilibrium/phenolpthalein.htm>. 4. "Titration." An Introduction to Chemistry - Bishop. N.p.‚ n.d. Web. 28 May 2010. <http://chiralpublishing.com/Bishop_Titration.htm>. 5. stander. "Acids and Bases." Chemistry and New Zealand. N.p.‚ n.d. Web. 28 May 2010. <http://www.chemistry.co.nz/acids_and_bases
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Report of redox titration--- Iodine titrated against sodium thiosulphate Objectives The objective of this experiment is to balance the equation for the reaction between sodium thiosulphate and iodine. Principle As the reaction between sodium thiosulphate and iodine is a redox reaction‚ so I make use of this to perform a redox titration‚ iodine titrated against sodium thiosulphate. From the experimental result‚ I can find out the number of mole of the two substances‚ hence I can calculate
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___________________ Functional Groups Class __________________ SMALL-SCALE EXPERIMENT VITAMIN C IN TABLETS 38 Small-Scale Experiment for text Section 23.3 OBJECTIVES • Determine the vitamin C content of vitamin C tablets by iodometric titration. • Observe the oxidation of vitamin C in aqueous solution. INTRODUCTION Vitamins regulate biochemical reactions that take place within living cells. The human body requires vitamins only in tiny amounts. For a compound to be classified as a
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