Separating a Mixture of Compounds Exp. No. 2 name Chemistry 145 February 2‚ 2014 I. Purpose The purpose of this experiment was to separate this mixture into components‚ determine the mass and percentage of each component. In addition to test the accuracy of an alternative method of subtraction to find the mass of the sodium chloride directly. Start with a mixture of sand (SiO2)‚ sodium chloride (NaCl)‚ and ammonium chloride (NH4Cl)‚ and use these separation processes: sublimation filtration
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Introduction: Copper (II) Chloride is the compound with a chemical formula of CuCl2. This is a light brown solid‚ which slowly absorbs moisture to form a blue green dihydrate. Copper (II) Chloride is highly soluble in water and will produce a blue solution. solutioAluminum is the compound that has a chemical formula of Al. This is a silver solid that can be easily formed‚ machined‚ or cast. In this lab‚ we will be finding the limiting reactant between Copper(II) Chloride and Aluminum. The limiting
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Copyright © Glencoe/McGraw-Hill‚ a division of the McGraw-Hill Companies‚ Inc. Formula Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 N2H4 H N N H H H 14 7 H N N H H H H N H 2 N H H Unnecessary (octets complete) SiO2 O Si O O Si O Name Date Class TEACHING TRANSPARENCY WORKSHEET Lewis Structures 29 Use with Chapter 8‚ Section 8.3 1. Step 1 in drawing the Lewis structure for a molecule is to decide which atoms of the molecule
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In order to find the formula of the copper chloride hydrate‚ we had to separate the compound to find the mass of water and copper. To begin this process‚ we evaporated the water and created an anhydrous compound‚ meaning we were left with only CuxCly. By calculating the weight of both the anhydrous and the hydrated compounds‚ we could conclude that the difference in the weights was the weight of the H2O. From this we were able to calculate the percent composition of CuxCly and H2O (see Calculations:
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Aims The aims of this investigation are: 1. To find the rate equation of the reaction of hydrogen peroxide and iodide ions. This will be achieved by using an iodine clock method and colorimetric analysis. 2. Draw a graph of rate against concentration for each reactant (Hydrogen peroxide‚ potassium iodide and H+ ions). 3. Finding the order for each reactant 4. Finding the rate-determining step. 5. Proposing a mechanism for the reaction. 6. Using Arrhenius’ equation to find the activation
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Investigating the Determining Characteristics of Cations and Anions Chem 111 Sec 560 Introduction: The purpose of this lab was to study the specific characteristics of cations and anions‚ and ultimately to be able to identify an unknown substance based on our studies and tests using the logic trees developed through the experiment. A logic tree is a graphical display of the findings from this lab which‚ through a series of yes/no questions‚ elimination
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Oxides with a perovskite structure yield many commercial ferroelectrics (materials that possess a net macroscopic polarization switchable under external electric field). The structure of these oxides‚ having a general formula ABO3‚ can be represented as a network of corner-sharing oxygen octahedra with higher-charge cations B located inside these octahedra and lower-charge cations A occupying the cavities between the octahedra. Typically the spontaneous polarization originates from the concerted
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Name: Lisa Brewer iLab‚ Week # 2 CATIONS AND ANION LAB Introduction The purpose of this week’s lab is to learn to demonstrate a double-replacement reaction of ionic compounds. To accomplish this‚ two ionic compounds will be mixed together and the product will precipitate out of solution. In this procedure‚ the product must be precipitated out of the solution and then weighed. For this lab‚ lead (II) nitrate (Pb(NO3)2) and potassium chromate (K2CrO4) will be reacted together to demonstrate
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MOLE UNIT REVIEW WORKSHEET 1. Convert 500.0 g NaCl to formula units. 5.15 x 1024 f.u. Convert 9.8 x 1024 molecules of C2H6 to grams. 4.9 x 102 g The mass of an unknown gas is 11.59 g. The mass of an equal volume of He is 1.45 g. Calculate the molar mass of the unknown gas. 32.0 g/mol Calculate the percentage composition of sulphur in Al2(SO4)3. 28.11% Calculate the molar mass of Co2(SO4)3•6H2O 514.16 g/mol The empirical formula for a compound is C2H5O and its molecular mass
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Chem 310-003 February 9th‚ 2013 Conclusion: Free Radical Chlorination The primary purpose of this experiment was to carry out the chlorination of 1-chlorobutane so that dichlorobutane formation was favored. Gas Chromatography was used to analyze the amount of dichlorobutane isomer produced in the free radical reaction. A mixture of 8mg of catalyst‚ 1mL of 1-chlorobutane‚ and 0.32mL of sulfuryl chloride was added to a microscale reflux apparatus. After 17mins the reaction
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