Purpose: In this lab‚ a mixture of naphthalene (C10H8)‚ common table salt (NaCl)‚ and sea sand (SiO2) will be separated using the separation techniques in order to demonstrate the properties of mixtures and their ability to be separated by physical means. INTRODUCTION: This lab was based on the separation of the components of a mixture. A mixture can be defined as a physical combination of two or more pure substances. Separation techniques are used to separate components that are not chemically
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Abstract The chloride present in an unknown soluble sample was precipitated into silver chloride through precipitation gravimetry. The colloidal silver chloride originally formed was converted to a crystalline solid by controlling certain parameters of the experiment such as temperature‚ pH of the solution‚ and concentration of AgNO3. Once the solid was large enough‚ it could be washed‚ filtered‚ and weighed. The percentage of chloride present was found to be 24.73695223 (±0.00000006) %.
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Alyssa Erika L Borras Date Due: 18 January 2013 Date Submitted: 18 January 2013 Experiment No. 3: GRAVIMETRIC DETERMINATION OF PHOSPHORUS IN FERTILIZER SAMPLES I. Abstract The purpose of this experiment is to determinethe Phophorus content of fertilizer samples using Gravimetric Analysis. It involves dissolution of the fertilizer sample‚ precipitation and heating and cooling of the sample. Pooled standard deviations
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gases H2 and NO2? H2is a colorless‚ odorless gas while NO2 has a reddish-brown color and has a pungent toxic odor. 8. Using water‚ how could you distinguish between the white solids KCl and PbCl2? You could distinguish them by their solubility. KCl is water soluble while PbCl2 is not. 9. Write equation for the decomposition of H2CO3 (aq) and H2SO3 (aq). H2CO3(aq) -------> H2O (l) + CO2 (g) H2SO3(aq) -------->H2O (l) + SO2 (g) Questions: 1. Complete and balance
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unknown sample in a test tube or spot plate‚ then add a few drops of 1M NaOH solution. At the same time suspend a piece of red litmus paper over unknown solution. If red litmus paper turns blue‚ it indicates the existence of NH4+ ion. 3.Sample solubility and solution tests (i) Dissolve ~1/2-2/3 of sample in ~10-15mL of DIW. Always retain a sample of original sample! This sample/DIW ratio will give ion concentrations of ~0.1-0.2M for soluble salts of unknowns. (ii) Observe pH to one SF
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the beaker that penny is placed in‚ then determine the amount of HCl that was used up in the reaction of HCl and Zinc. Calculate the % of zinc in penny. 6) If zinc reacts with NaOH in the titration experiment‚ then zinc hydroxide will form. Check solubility rules to see if zinc hydroxide is soluble of insoluble. Then calculate for % zinc in penny. Questions: 1. What is the weight of a post 1982 penny? 2.5 grams 2. What is the percent copper and zinc in a post 1982 penny? 97.5% Zn and 2.5% Cu 3.
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CERTIFICATE This is to certify that this dissertation titled “STUDY OF QUANTITY OF CAESIN PRESENT IN DIFFERENT SAMPLES OF MILK” submitted by Raunak Padamtintiwar to Chemistry department of Nirmal Higher Secondary School carried under guidance and supervision during the academic year 2014-2015. Mr Ninan Sir ACKNOWLEDGEMENT I wish to express my deep gratitude and sincere thanks to the Sir‚ for his encouragement and for all the facilities that he provided for this project work. I sincerely appreciate
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or more components of a solid‚ liquid‚ or a gaseous mixture into a separate phase [1]. The substance being extracted is separated between two immiscible combined phases‚ and the ratios of its distribution between the phases depend on the relative solubility of the solute in each phase. A type of extraction‚ Liquid-liquid extraction is a process used in isolating and purifying products from chemical reactions. This
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SOLVENT EXTRACTION Solvent extraction‚ also known as liquid extraction and partitioning‚ is a method to separate compounds based on their relative solubility in two different immiscible liquid‚ usually water and organic solvent. It is an extraction from one liquid phase to another liquid phrase. Liquid extraction is a basic technique in chemical laboratories‚ where it is performed using a separator funnel. This type of process is commonly performed after a chemical reaction as part of the work-up
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Tatiana Pachova BSc‐2‚ chemistry Assistant : Chandan Dey Sciences II – lab. A Nitration of bromobenzene (n°28) 1. INTRODUCTION 1.1) 1.2) Purpose The objective of this experiment is to synthesize the p‐bromonitrobenzene (bromo‐1‐nitro‐4‐benzene) out of bromobenzene‚ by nitration. Scheme Br Br HNO3 / H2SO4 Mechanism The first step is the formation of the NO2 from the nitric acid: NO2 1.3) O O S N
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