Analytical Chemistry Experiment 2b: Determination of the ASA Content of Aspirin Due Date: September 16‚ 2013 Experiment#: 2b Title: Determination of the ASA Content of Aspirin Aim: To determine the Molar Concentration of NaOH and HCl acid used in their Standardization processes and to determine the acetylsalicylic acid (ASA) content in Aspirin. Materials/Apparatus: materials used are the same as that outlined in the laboratory procedure prepared by the laboratory instructor. Procedure:
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Homework has traditionally been considered a reinforcement of what students learn throughout the school day and is often used as a tool to make sure students have fully understood the curriculum at hand. Excessive amounts of homework constantly put pressure on students and cause them to spend outrageous amounts of time taking away from their social lives‚ families‚ friends‚ and extra-curricular activities as well as sports. Excessive amounts of homework can also cause students to stay up till midnight
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Sam (name changed to protect confidentiality) is a nine month old boy who was born at 26 weeks and diagnosed with chronic lung disease. He was sent home on 0.3 litres (L) of oxygen per minute with the view of gradually weaning this down as he grew stronger. When I joined the community nurse visiting Sam at home‚ he had been weaned down to 0.1L of oxygen per minute‚ so was now having his time on oxygen weaned down; from continuous oxygen eventually to none. The community nurses follow the trust’s
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Technology is one of the greatest inventions of all time. Screen time is part of almost everyone’s life every day. Many people believe that screen time is a big problem‚ yet that is not entirely true. Excessive screen time is harmful when turned into an addiction‚ yet a little screen time a day can be helpful. Parents believe that the best way to control screen time is to limit it at home. I believe that parents should not limit screen time at home because it can teach kids to be independent
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“Use of Biuret Reagent to Test for Proteins In Food” Cindy Zhou Introduction Protein is a series of amino acids that are connected together by peptide bond. The bond is located between the end of previous amino acid‚ which is the carboxyl group‚ and the head of next amino acid‚ which is a amino group. The Biuret reagent is a solution of copper sulfate and potassium hydroxide. When peptide bond are presented‚ the copper (II) will interact with them (MadSci Network: General Biology). It is
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Destiny Stuart Partner’s Name: Shanygne Swann Lab Report #2 Title of Experiment: Static Friction and Limiting Equilibrium Brief Theory of Experiment: In limiting equilibrium‚ the sum of the forces on block X and on the hanging masses (load) Y is zero. The load is increased to a value until block X just slides at constant speed when the table is tapped. Tapping the table destroys the limiting equilibrium condition momentarily by altering the balance between tension (T) in the string and
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Examination #2 - Chapters 4‚5‚ and 6 Study Guide Chapter 4 - Chemical Quantities and Aqueous Reactions * Reactions Stoichiometry * mole-mole conversions * mass-mass conversions * Limiting Reactants * What is the Limiting Reagent * How do we find the L.R. * Solutions * Molarity - definition and how to calculate * Dilutions Calculations (M1V1 = M2V2‚ careful with M2) * Solution Stoichiometry * volume-volume conversions * volume-mass
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EXPERIMENT 10 Volumetric Analysis I Standardization of NaOH Solution Outcomes After completing this experiment‚ the student should be able to: 1. 2. 3. 4. Demonstrate the concept of quantitative analysis. Make solution and standardize it. Explain the difference between primary and secondary standard solutions. Quantitatively determine the concentration of a base. Introduction Titration is a common method of quantitative analysis used to determine the concentration of an unknown substance in a solution
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Experiment 5- Standardization of NaOH and determination of Molarity of an unknown Acid Objectives 1. Preparation and standardization of a 0.1M NaOH solution 2. To learn the technique of titration 3. Determination of the concentration of an unknown diprotic acid. Introduction Titration can be traced to the origins of volumetric analysis‚ which began in the late eighteenth century. Study of analytical chemistry began in France and the first burette was made by Francois Antoine Henri
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Gives best results when 1o alkyl halides are used. Mechanism is SN2. Alkoxides may be prepared by reacting an alcohol with NaH or by reacting an alcohol with Na metal. Phenoxides may be prepared by reaction of phenols with NaOH ROH + NaH ROH + Na ArOH + NaOH RO Na - - + + H2 RO Na + + 1/2 H2 + ArO Na - + H2O When 3o alkyl halides are reacted with alkoxide or phenoxide ions‚ elimination is the major reaction‚ not substitution When 2o alkyl halides
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