vividly portrays his love of imperfections by his choice of words. For example "For rose-moles all in stipple upon trout that swims;" by that Gerard Hopkins said that the moles on the trout’s body or scales that he compared with a beautiful rose. We all know that moles sometimes can be ugly and hideous‚ but to Hopkins - he said otherwise. For he saw the trout with moles have a beautiful rose-flowering moles painted all over them. Another example of Hopkins love of things that are not perfect is
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Ion Exchange Chromatography Week 10 TAG Question 1: Chapter 6-4 of your technique book provides a detailed description of how to run a ion- exchange column. Assume you have a cation-exchange column already prepared and ready to use. Create an outline of no more than 10 steps describing how you will regenerate the column‚ load your sample and collect the hydronium ion released. 1. Open the stopcock at the bottom of the column and allow solution to drain out until the solution level in the
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A The % Composition and Empirical Formula of a Hydrate: It Doesn’t Hold Water‚ Or Does It? 1. To determine the percent water in an unknown hydrate. 2. To calculate water(s) of crystallization for an unknown hydrate. 3. To determine the formula of an unknown hydrate. OBJECTIVES SKILLS Proper use of the following equipment: Dial-O-Gram balance (Laboratory Technique I)‚ electronic balance (Laboratory Technique II) and Bunsen burner (Laboratory Technique III). Dial-O-Gram balance‚ electronic
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calculation. 1. Write out a balanced "equation" for the process you investigated in Part I‚ including phase symbols. NaOH(s) --> Na+(aq) + OH-(aq) 2. Calculate the number of moles of sodium hydroxide dissolved. Show your work. Moles of NaOH = 2.535 grams NaOH X (1 mol/40.00 grams) = 0.06338 moles NaOH 3. Calculate the amount of energy involved in this dissolving process. Show your work. 205 g H2O c = 4.184 J/gC T2 = 27.8 C T1 = 24.5 C Heat gained by H2O = 205 g X 4.18
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usually‚ photosynthesis rate is expressed as how many moles (actually micromoles) of CO2 does one square meter of leaf assimilate in a second. Basing the rate on a square meter of leaf might seem strange since most leaves are small; nowhere near a square meter in area‚ more like a few square cm. However‚ the meter‚ not the cm‚ is the base unit of length in the SI system‚ and the second‚ not the minute‚ the base unit for time. The reason that moles‚ not volume‚ of CO2 is the unit used when expressing
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portions of this write-up. YOU WILL NOT BE TURNING IN THE QUESTIONS LISTED BELOW AS SHOWN – RATHER YOU ARE TO INTEGRATE THEM WITHIN YOUR FORMAL LAB WRITE-UP. General Instructions (A Place to Start): 1. Start your lab by making a data sheet. The mole calculations that you will be making when you write up this lab will be based on the data you record before and after the experiment. Be certain that this data is recorded in an organized manner‚ with all the appropriate units included. Be as accurate
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all of the CaCO3 and then titrating the remaining unreacted HCl with NaOH solution to determine the amount of acid which did not react with the calcium carbonate. The difference between the moles of the acid (HCl) initially added and the moles of HCl left unreacted after the reaction‚ is equal to the moles of HCl that did react with CaCO3. The reaction used to determine the amount of unreacted acid by titration is given below. This type of analysis is generally referred to as a back-titration
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Lab 1: Synthesis of Aspirin Introduction: The purpose of this lab was to demonstrate the ability to easily alter the molecular structure of a compound to greatly increase its utility. In this case‚ an acetyl group was added to salicylic acid‚ a naturally occurring compound with significant pharmaceutical value. Without the addition of the acetyl group‚ salicylic acid is an irritant to the gastro-intestinal (GI) tract. Once the acetyl group is added via a simple reaction‚ acetylsalicylic
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OH- ions in this way releases energy. In this practical‚ the enthalpy changes accompanying different neutralization reactions will be measured. It is because the number of moles of water formed varies according to the acid and alkali used‚ it is the convention to measure enthalpy change of neutralization in kJ mol-1 when 1 mole of water is formed. We will use a simple calorimeter to determine the enthalpy change of neutralization for the pairs of acid and base given. Apparatus and Materials: 1
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Title: Determination of chloride by the Mohr Method Objective: To determine chloride by using Mohr Method. Introduction: The Mohr method is the method used to determine the chloride ion concentration of a solution by titration with silver nitrate. As the silver nitrate solution is slowly added‚ a precipitate of silver chloride forms. Ag+ + Cl- AgCl(s) (Ksp for AgCl is 1.810-10) The chloride ion (Cl-) is an important anion found in solids and solutions. Chloride is the predominant anion
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