Due: November 4‚ 2012 Percent Composition of Hydrates Lab Report Michelle Sims Due: November 4‚ 2012 Percent Composition of Hydrates Lab Report Michelle Sims Purpose: Demonstrate proficiency in using the balance and Bunsen burner. Determine that all the water has been driven from a hydrate by heating your sample to a constant mass. Relate results to the law of conservation of mass and the law of multiple proportions. Perform calculations by using the molar mass. Analyze the results
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of Chemical Reactions Objective In this lab we took Fe(NO3)3 and NaOH and mixed 7 different mole ratios in graduated cylinders to determine what the mole ratio is. We also did the same thing with solutions of CuCl2 and Na3PO4. We determine the mole ratios by graphing the volume of reactant #1 vs. volume of precipitate for each reaction. Data Part 1.) Cylinder 1 2 3 4 5 6 7 Fe(NO3)3‚ 0.1 M‚ ml 5 10 12 15 17 20 24 NaOH‚ 0.1 M‚ ml 55 50 48 45 43 40 36 Fe:OH mole ratio
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Determining the Number of Water Molecules in a Hydrate Results Mass of empty beaker 55.11 g Mass of beaker with hydrated copper (II) sulfate 58.13 g Mass of hydrated copper (II) sulfate 3.02 g Mass of beaker with dehydrated copper (II) sulfate (last weighing) 57.22 g Mass of dehydrated copper (II) sulfate 2.18 g Mass of dehydrated copper (II) sulfate (2nd weighing) 2.11 g Questions 1. Calculate the value of “n”. Show your work. Include an example of ALL calculations involving
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12 Percent of water in a hydrate The goal of Experiment 12 was to learn how to calculate the percent of water (by mass) in barium chloride and an unknown hydrate salt‚ as well as properly calculating the water of crystallization for the unknown hydrate salt. A hydrate salt is composed of anions (-) and cations (+) surrounded by a fixed number of water molecules‚ called water of crystallization. The hydrate decomposes upon heating and produces an anhydrous
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Moll Flanders‚ A Fallen Angel Moll Flanders‚ the main character in the book The Fortunes & Misfortunes of the Famous Moll Flanders‚ written by Dafoe‚ is telling her life story in this book. The reader can see how her life rise and fall‚ how she is a maid‚ then become a wife in a rich family‚ up and down‚ and then fall into the criminal world. She is a dynamic character. Her up and down life‚ mostly down‚ causes her character to change throughout the novel. Dafoe has succeed to create a Moll that
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Good evening ladies and gentlemen and welcome to the Apex Club of 2013‚ my name is James Bajjada and tonight‚ I shall discuss and introduce the notion of Australia as a global citizen and the role our country has played in promoting World wide peace‚ security and equality. What is a Global citizenship? Global Citizenship is about understanding the need to tackle injustice and inequality‚ and having the desire to do so. It is about valuing the Earth as precious and unique‚ and safeguarding the future
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Mole Fraction Return to Solutions Menu The mole fraction is: moles of target substance divided by total moles involved The symbol for the mole fraction is the lower-case Greek letter chi‚ χ. You will often see it with a subscript: χsolute is an example. Example #1: 0.100 mole of NaCl is dissolved into 100.0 grams of pure H2O. What is the mole fraction of NaCl? Solution: 100.0 g / 18.0 g mol¯1 = 5.56 mol of H2O Add that to the 0.100 mol of NaCl = 5.56 + 0.100 = 5.66 mol total Mole fraction
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! ! Bernie&Ecclestone’s&Formula&for&Formula&One& ! ! Formula!One!motor!racing!!(F1)!is!big!business.!!From!the!first!Grand!Prix!in!1906!it!was!able!to! generate!excitement!among!fans!and!media.!!But!it!is!only!since!its!reinvention!in!the!1980s!that! the!sport!has!been!able!to!generate!a!commensurate!level!of!excitement!among!business! observers.!!! ! F1!is!one!of!the!worlds!most!popular!–!and!profitable!–!sports.!!It!thrills!a!television!audience!of! over!500!million!fans!per!year!who
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S. 5.2 – The Mole The mole: - - - - Ex. - Molar mass (g/mol): - - - Ex. |Element |Atomic mass shown on Periodic |Molar mass of element | | |table | | |N |14.0067 |14.0067 g
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Dehydrating and Rehydrating a Hydrate Introduction The mass percent of water was determined using the mass of water and dividing it by the total mass of the hydrate and then multiplying that answer by 100%. The number of moles of water in a hydrate was determined by taking the mass of the water released and dividing it by the molar mass of water. The number of moles of water and the number of moles of the hydrate was used to calculate the ratio of moles of water to moles of the sample. This ratio
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