Experiment 8 Unique # 51070 The main purpose of the experiment involves two oxidation-reduction reactions to calculate the oxidizing capacity of a sample of unknown bleach. In order to determine the volume of Na2S2O3 added‚ students will conduct a titration of bleach with thiosulfate with addition of a starch indicator to find the end point of the titration. Moreover‚ the oxidizing capacity of bleach is calculated with the percentage by mass of NaOCl in the unknown bleach sample. The overall
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Introduction The purpose of this lab was to determine the mole ratios of the reactants hypochlorite ion (OCI ) and thiosulfate (S O ) when reacted in a chemical reaction. A chemical equation gives the mole ratios of the reactants and products involved in the chemical reaction. When some formulas of the products are not known‚ experimental measurements can be made to determine those ratios. During this reaction‚ hypochlorite ions oxidize the thiosulfate ions according to the unbalanced and incomplete reaction
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solution would be 0.00935 M. Enter your calculated molarity of the primary standard KIO3 solution. Please use 3 significant figures. Your Answer: 0.01 You Scored 3 points out of 3 Possible 7) Data Entry - No Scoring Standardization of the sodium thiosulfate solution using the potassium iodate primary standard solution. We must examine each of the three acceptable trials. First‚ let’s consider the analyte volume. You were instructed to pipet two 10.00 mL aliquots of potassium iodate into
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Oxidation of a Secondary Alcohol Using Hypochlorite October 8‚ 2013 Jennifer Karigan CHEM 2081-004 Jonathon Musila Introduction The purpose of the experiment was to oxidize and identify an unknown alcohol using hypochlorite‚ or household bleach. During the experiment‚ the bleach oxidized the secondary unknown alcohol into a liquid ketone which was distilled or boiled to find the boiling point and then identified using a chart of unknown identities
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Analysis of a Commercial Bleach Purpose: The purpose of this lab is to determine the amount of sodium hypochlorite (NaClO) in commercial bleach. This can be done by forming triiodide ions. To make the measurement more accurate‚ starch was added to help determine the endpoint of the solution. The significance of this lab is that industry can use these techniques to determine the amount of NaClO in the bleach of the rival industry and improve it. Hypothesis: The hypothesis is that‚ an accurate
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oxidizing agents‚ are bleaches‚ hair coloring agents‚ scouring powders‚ and toilet bowl cleaners. The most common oxidizing agent in bleaches is sodium hypochlorite‚ NaClO (or NaOCl). Commercial bleaches are made by bubbling chlorine gas into a sodium hydroxide solution. Some of the chlorine is oxidized from the molecular form (Cl2) to the hypochlorite ion‚ ClO-. Some of the molecular form is also reduced to the chloride ion‚ Cl-. This type of reaction‚ where the same type of element is both oxidized
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Hydrogen Peroxide & Inorganic Peroxy Compounds Hydrogen Peroxide Hydrogen peroxide (H2O2) is the simplest peroxide (a compound with an oxygen-oxygen single bond). It is also a strong oxidizer. Hydrogen peroxide is a clear liquid‚ slightly more viscous than water. In dilute solution‚ it appears colorless. Reactions Decomposition Hydrogen peroxide decomposes exothermically into water and oxygen gas spontaneously: 2 H2O2 → 2 H2O + O2 This process is thermodynamically favorable. It has
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masses‚ and the three volumes (from the three trials) needed to titrate the bleach Calculations (Data and Calculations Section in lab) 1. Use the equations given on the front page to determine the number of moles of sodium thiosulfate that are equivalent to one mole of sodium hypochlorite. 2. From your three trials‚ calculate the average volume of Na2S2O3 needed for the titration of 25.00mL of diluted bleach. 3. Use the average volume and the molarity of Na2S2O3 to determine the molarity of the diluted
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The Element: Chlorine General Information We researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 energy levels. Chlorine exists as a greenish-yellow gas at normal temperatures and pressures. Chlorine is second in reactivity only to fluorine among the halogen elements. Chlorine is a nonmetal. It is estimated that 0.045% of the earth’s crust and 1.9% of sea water are chlorine.
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2 ClO4- + 2HOAc + 2HgCl2 Assay of Phenytoin Non Aqueous alkalimetry Blank titration Sodium methoxide Saturated sol’n of Azo violet in Benzene H C6H5 N--C=O C C6H5 C-NH + CH3O- O C6H5 N=C-O C C6H5 C-NH + CH3OH O OXIDATION-REDUCTION REACTION OXIDATION-REDUCTION REACTION: IODIMETRIC AND IODOMETRIC METHOD SUBSTANCE TO BE ASSAY AQUEOUS/NON-AQUEOUS ALKALINITY
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