EXPERIMENT # 04 OBJECT: Determination of different inhibitors that inhibit the rate of Enzymatic Browning in different fruits and vegetable. REQUIREMENTS: ➢ Citric Acid (1% solution) ➢ Acetic Acid (1% solution) ➢ Ascorbic Acid (1% solution) ➢ Sugar (1%.Solution) ➢ Sodium chloride (1% solution) ➢ Sulfite salt (1% solution) ➢ Samples (Potato‚ Banana‚ Apple) Enzymatic Browning: Enzymatic browning (oxidative) is a reaction between oxygen and a phenolic
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2014 Lab Day and Time: Tuesday 2-5 Unknown # 4224034-DF14 Introduction The purpose of this semester long experiment was to determine an unknown organic acid. An organic acid is an organic compound with acidic properties. A base reacts with acids to form salts. Titrations are used to determine the concentration of unknown substances. The purpose of the KHP experiment was to determine the molarity of NaOH. HCl titrations are mainly to check technique and used to verify the molarity of
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Chemistry 123 Fall ’14 Exam I (CH I‚ II‚ III) Instructions: Read each problem carefully before you begin. Be certain that you answers are clear and legible: Clearly Circle One Answer Only. Make sure to review you answers before you turn the exam in. Please place your answers on the answer sheet. You should also circle the correct letter for back up purposes. Print your name: ___________________ Sign your name: ___________________ Answer Sheet 1 C 16 A 2 E 17 D 3 B
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------------------------------------------------- The Mondragon Experiment * Government * Econ By Greg MacLeod | April 4‚ 2009 | 10:28 PM The concept of the corporation reaches back to Roman times. However‚ the modern business corporation evolved radically from its ancient roots into a form with little relation to the purpose as understood by historians of law. Today‚ the typical business corporation seems to be a disjointed entity whereby shareholders seek maximum income‚ labor unions
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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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Cline Period 3 November 19‚ 2013 Laurel Hergenroeder and Sarinah Martelli Introduction/Purpose The purpose of this experiment is to run various tests on the substance called alum. (AlK(SO4)2 ∙ 12H2O). These tests like the process of filtration heating the solution will reveal things such as melting point‚ percent hydrate‚ as well as percent sulfate. After the experiment‚ the experimental mole ratio of alum to water will be calculated and then compared with the accepted mole ratio. (This is
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Cydney Kessler Date of Experiment June 13‚ 2015 Report Submitted: June 15‚ 2015 Title: Laboratory Techniques and Measurements Purpose: In this experiment I will determine the mass‚ density‚ volume‚ lengths and temperatures of different objects and liquids to help me better understand the importance of Chemistry and how Chemistry plays a big role in our everyday lives. Procedure: In the experiment‚ I use devices such as a ruler‚ beakers‚ flasks‚ a scale and cylinders
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Chem 1406 Isolation of Casein Report Sheet Name Melanie Black-Van Wright Date 11/10/14 Partner if applicable Part I: Observations of formation of casein precipitate The milk began to curd. As the curd increases the milk appeared more clear at times. Mass of casein 1.65 g Part II: Test tube Observation of CuSO4 biuret Test Test Results (+ or -) Casein Solution turned violet + Egg white solution turned violet + Water solution turned blue - Sugar solution turned blue - Postlab Questions 1.
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Case 2 Chem-Med Company 1. Net Sales Growth (all credit)=[(Current Year Net Sales-Last Year Net Sales)/Last Year Net Sales]X100 a. Sales Growth 2007=[(3814-3051)/3051]X100= 25% b. Using the same formula for the remaining years and the data in figure 1 of the pro forma section: 2008=40% c. 2009=40% d. 2010=40% 2. Net Income Growth=[(Current Year Net Income-Last Year Net Income)/Last Year Net Income]X100 e. Net income Growth 2007=[(1150-766)/766]X100=50%
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of the research question: I was particularly interested in the difference in intermolecular forces of different nitrates and their relation with ionic radius. My imagination caught fire when I thought of this and thus I proceeded to conduct this experiment to find the relation between temperature of solubility‚ molar mass and ionic radius. Intermolecular forces had sparked interest in me from the very day it was begun to be taught. I have chosen all nitrate salts only as I wanted to compare my temperature
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