ingredient in Antabuse‚ a drug used for the treatment of chronic alcoholism‚ is tetraethylthiuram disulfide The sulfur in a 0.4329-g sample of an Antabuse preparation was oxidized to SO2‚ which was absorbed in H2O2 to give H2SO4. The acid was titrated with 22.13 mL of 0.03736 M base. Calculate the percentage of active ingredient in the preparation. 5.) The phosphorus in a 0.1969-gram sample was precipitated as the slightly soluble (NH4)3PO4·12MoO3. This precipitate was filtered‚ washed‚ and then
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LAB#: 20 SKILL: Planning and Designing OBSERVATIONS: A student is given a small beaker containing an unknown salt‚ x. The salt is crystalline‚ deliquescent and colorless. The student is asked to perform test and observation on the salt to determine the cation and anion present. HYPOTHESIS: Perhaps by using the flame test or reacting salt x with NaOH‚ or NH4OH the cation could be distinguished by observing the color changes or solubility while reacting salt x with H2SO4 or a mixture of copper
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GRAVIMETRIC ANALYSIS OF A CHLORIDE SALT Report Submitted by: Ronald Milner Laboratory partner: Kiesha Mantik Lab Performed: February 16th‚ 2012 Group: Thursday Afternoon‚ Group F Date submitted: March 14th‚ 2012 Purpose: To determine the chloride content of an unknown soluble salt while illustrating the techniques involved in gravimetric analysis. Theory: In order to find the chloride content of an unknown soluble salt‚ that chloride can first be extracted from the
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evidences of a chemical reaction‚ thus‚ of a chemical change. Materials Crucible tongs Evaporating dish Glass rod Test tubes Test tube rack Thermometer Analytical balance Magnesium ribbon pH paper 1M copper (II) sulfate Iron metal 6M hydrochloric acid Procedure Magnesium and oxygen test A small strip of magnesium metal is held on one end with a pair of crucible tongs‚ while the other end is ignited with the flame of Bunsen burner. The burning ribbon is held
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veneer over true feelings‚ which are of gratitude at this point of time." I would like to express my sincere gratitude to my chemistry teachers Mrs. Meenakshi‚ Mrs. Sonali and Mrs. Shampa for their vital support‚ guidance and encouragement - without which this project would not have come forth. I would also like to express my gratitude to the staff of the Department of Chemistry at NPS HSR for their support during the making of this project. CONTENTS 1. Certificate...........................
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Seperatation Technqiues of Sand/Salt/Water Mixture Most of the material that are encountered in everyday life are not pure substances. Materials ranging from cement‚ food and ink are formed from physical combinations of various substances called mixtures. A mixture is a type of material that consists of two or more different substances that are not chemically combined. All mixtures can be separated back into its original state except for those that undergo irreversible change. A mixture can take
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Lab Report 7: Analysis of Cereal Introduction: The objective of this lab was to consult for the FDA regarding a recently surfaced scandal involving false reporting of iron content in cereal as well as iron tablets. The makers of the cereal and the iron tablets‚ respectively‚ were allegedly reporting higher amounts of iron in their products than actually existed‚ as a way to save money but continue to provide products with “adequate” amounts of iron. The FDA needed consulting in order to analyze
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Floyd Askew 3/19/13 CHEM 1211L Lab Report Introduction The purpose of this lab is to use volumetric analysis to determine the concentration of unknown substances. A sodium hydroxide solution is standardized to assist in finding the concentration of an acetic acid. An indicator must be used to pin point the equivalence point‚ the point in which 1 mole of a substance is equal to 1 mole of another. When that is found‚ we can determine the concentration. HC2H3O2 (aq) + NaOH (aq)
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DEMONSTRATOR: BONEYFACE ANTWI DATE: 8TH FEBRAURY 2011. AIM To determine the carbonate content of garden lime‚ by performing an analysis involving a back titration. INTRODUCTION Garden lime is used by gardeners to reduce the acidity of the soil. It consists of ground limestone which is predominantly calcium carbonate.
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Organic Chemistry Laboratory Report. Experiment 1: Crystallization. Objectives: 1. To study the crystallization process. 2. To identify the best suitable solvent to use for the crystallization process. 3. Gain an experience in purifying an organic compound by the techniques of the crystallization. Introduction. Crystallization is a technique which chemists use to purify solid compounds. It is one of the fundamental procedures each chemist
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