Determination of Vitamin C (Ascorbic acid) concentration in some of Commercial Products‚ by Redox Titration Mouhannad AL.-Hachamii Sadiq J. Baqir Saadon A.Aowda Fatima A. Hussein‚ Dep.of chemistry‚ college of science‚ Babylon University Muhammed K.Alasedi Ministry of Health Hilla city‚ Babylon Abstract The goal of this search is to determine the concentration of vitamin C (Ascorbic acid ) in some of a Commercial Products‚ Vegetables and Fruit Juices by Redox Titration. A redox
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Acetic acid (glacial) 100% suitable for use as excipient EMPROVE® exp Ph Eur‚BP‚JP‚USP‚E 260 For general questions please contact our Customer Service: Merck KGaA Frankfurter Str. 250 64293 Darmstadt Germany Phone: +49 6151 72-0 Fax: +49 6151 72 2000 01 March 2014 Product number Packaging Qty/Pk 1000562500 Glass bottle 2.5 l 1000569025 Plastic container 25 l 1000569190 Plastic barrel 190 l Accessories 101595 Chemizorb® H+ Absorbent and neutralizer for spilled acids‚ with indicator
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Assignment 2: Answer Sheet (LSM 1401 Semester 2 AY2011/12) Nucleic Acid Virtual Laboratories |Name | | |Matriculation number | | |A. DNA Extraction Virtual Lab [2 marks]
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Abstract: Introduction: Materials: * Chemicals: Buffer solution‚ pH 7.0‚ 50 mL Phenolphthalein indicator solution‚ 1.0 %‚ 1 mL Potassium hydrogen phthalate‚ KHC8H4O4‚ 2 g sodium hydroxide solution‚ NaOH‚ 0.1 M‚ 150 mL Unknown weak acid‚ 1.5g Water‚ distilled or deionized * Equipment: Balance Stir bar Beaker‚ 250mL Oven Buret‚ 50 mL pH sensor Desiccator Rising stand and buret clamp Erlenmeyer flask‚ 125mL Wash bottle with distilled water Funnel Weighing dishes‚ 2
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Observations | Reaction Type | Complete and Balance | 1. When heated in oxygen‚ magnesium gives off a bright white flame. | combination reaction | 2Mg + O2-----> 2MgO | 2. Bubbling and fizzing occurs; the zinc appears to “dissolve” and what appears to be “steam” comes off out of container. | single-displacement reaction | Zn + 2 HCl (aq) --> ZnCl2(aq) + H2(g) | 3. Black smoke occurs | decomposition reactions | 2 (H2O2)(aq) MnO2 2 (H2O) + (O2) | 4. reddish-brown deposit
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HOW ARE REDOX REACTIONS DIFFERENT? Redox is the term used to label reactions in which the acceptance of an electron (reduction) by a material is matched with the donation of an electron (oxidation). A large number of the reactions already mentioned in the Reactions chapter are redox reactions. Synthesis reactions are also redox reactions if there is an exchange of electrons to make an ionic bond. If chlorine gas is added to sodium metal to make sodium chloride‚ the sodium has donated an electron
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Introduction Background Information To begin a discussion about acid-base titrations‚ we must first recall that there are several definitions of acids and bases. For the purpose of this exercise‚ we will consider the Arrhenius definition of acids and bases‚ in which an acid is a proton (H+) donor and a base produces hydroxide (OH-) in solution. When an acid reacts with a base‚ the products of this reaction are water and a salt. Note that salt here does not only mean table salt (NaCl)‚ but can refer
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The purpose of this experiment was to study the effect acid rain has on seed germination and after performing this experiment is can be concluded that acid rain has a negative effect on seed germination. When seeds are soaked in an acidic solution the process of germination slows. Acidic solutions‚ while do slow growth of a seed‚ they do not kill the seed. A seed can be dormant for a majority of its lifespan‚ seeds watered with acid solutions stayed in a dormant condition. For example‚ trial three
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TEABAG EXTRACT AS AN ALTERNATIVE FOR INK An Investigatory Project Chapters 1- 3 Submitted by: Alfonso‚ Manuela Fairbanks Garcia‚ Tonica Paga Cho‚ Jung Hun Lat‚ Manuel Miguel Feliciano November 2013 Chapter I Introduction A. Background of the Study The group will conduct the study because the group noticed that teabag extract is dark in colour and it can be use to make ink‚ and also the group noticed that teabags are made from natural resources. Some kinds
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Chemical Reactions Lab Objectives: 1. To examine a variety of reactions including precipitation‚ acid-base‚ gas forming‚ and oxidation-reduction reactions. 2. To identify the products formed in these reactions and summarize the chemical changes in terms of balanced chemical equations and net ionic equations. 3. To identify the species being oxidized and reduced in oxidation-reduction reactions and determine which species is the oxidizing agent and the reducing agent. Chemical equations represent
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