Experiment 1: Bromination of Acetanilide1 Precautions: Ethanol is flammable Sodium hypochlorite is an oxidizing agent and releases toxic fumes (handle in fume hood) Acetic acid is corrosive‚ harmful if inhaled‚ flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of acetanilide to p-bromoacetanilide Procedure: To a 125 mL Erlenmeyer flask containing a mixture of 95% ethanol (6 mL) and acetic acid (5 mL)‚ dissolve
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Experiment 4: Heating Under Reflux- Synthesis of Salicylic Acid from Wintergreen Oil Precious Ahmed ID# 6463614 Section 07‚ Friday afternoon Lab experiment performed on: Friday‚ January 19‚ 2013 Lab report submitted on: Friday‚ January 24‚ 2013 Introduction Before the synthetic aspirin of today‚ salicylic acid‚ which is the important ingredient found in aspirin‚ was extracted naturally from methyl salicylate found in Wintergreen oil‚ which could be found in certain plants. The purpose
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Lab‚ Week # 1 BALANCE LAB Introduction The purpose of this lab is to learn how to utilize two different balances to find the mass of different chemicals in the ChemLab program. A balance is an instrument used to determine the mass of a chemical. To accomplish this we use direct weighing and weighing by difference on both the centigram and electronic balances. Equipment 1 Centigram Balances 1 Electronic Balance 1 100ml Beakers 5 Copper Slugs 2 Unknown Weights (Label # 1‚ # 2)
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EXPERIMENT 1 “HOW DO I LOVE THEE LET ME COUNT THE WAYS...” DETERMINATION OF AVOGADRO’S CONSTANT Techniques Calibration drop counting MSDS available for • • stearic acid‚ CH3(CH2)16COOH cyclohexane‚ C6H12 Principles molar volume molecular structures surface areas and volumes Avogadro’s constant percent error Recommended Advanced Reading Chapter 3 in Petrucci‚ Herring‚ Madura‚ & Bissonnette’s General Chemistry‚10th Ed. Avogadro Constant...1 INTRODUCTION
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pH is ± 1. pH is a unitless value. The Dependent variable is the number of products produced. The uncertainty of this this measurement is ± 1 product. In order for this experiment to be controlled‚ many variable were identified and held constant. If these variables were not to be held constant than the findings of this experiment would be meaningless because there would be no way of desiring if the independent variable was the cause of the changes which were recorded In this experiment‚
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are and what precautions should be taken. Exercise 1: Structures of the Skin Observations Before beginning‚ set up a data table similar to this Data Table 1. Fill in the names of the numbered structures. Skin Diagram (National Library of Medicine at http://nih.nlm.gov) Data Table 1: Structures of Skin Item Name 1. Hair 2. Piloerector Muscle 3. Sebaceous Gland
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LAB 1 Background and Hypothesis: I know I haven’t passed the lab 1 H and B but I really do not want to lose points again just for the fact I didn’t get it done in time. I already lost -5 pts and I really don’t want to lose -20 pts. So I am just gonna go on a whim here and just get it done through here so it doesn’t automatically fail me without me at least trying. Background: Test to see if people who are Left Handed would be left thumb dominant and compare to see people who are Right Handed
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Effect of Protein Intake on Strength‚ Body Composition and Endocrine Changes in Strength/Power Athletes Introduction: Proteins are often called the building blocks of the body. Protein consists of combinations of structures called amino acids that combine in various ways to make muscles‚ bone‚ tendons‚ skin‚ hair‚ and other tissues. They serve other functions as well including nutrient transportation and enzyme production. Adequate‚ regular protein intake is essential because it isn’t easily
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Ale_____ Ram___ 30 de noviembre de 2012 _______________ BIOL 3503 Ecología Laboratory #1: Communities and Biomes 1. List the fish and invertebrates you selected after the nitrogen cycling process. I personally selected a maroon clownfish with two anemones. I also chose 5 sergeant majors‚ 2 bleenies and a yellow tang. 2. What changes did you make to your reef tank during the 12 weeks and why did you make them? After I selected my fish‚ I noticed that the tank
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Proteins Are the basic materials of every body cell. Body cells are constantly wearing out. As a result‚ they are continuously in need of replacement Of the six nutrients group‚ only proteins can make new cells rebuild tissue. By the age of 4 years‚ body protein content reaches the adult level of about 18% of body weight. An adequate supply of proteins in the daily diet is essential for the maintenance of health. The word protein is a Greek derivation and means “of first importance”. Composition
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