use of Grignard reagents. The percent yield of the product was 10% on a relatively humid day. The melting point was calculate to be 127.2oC with a literature value of 162oC. An IR spectrum of the product was taken and used for positive identification of the product. The mechanism of the formation of triphenylmethanol was explored. Byproducts were also considered and their mechanisms duly noted. Introduction: This experiment explores the use of organometallic reagents in addition reactions
grams of solid copper, Cu, precipitated; therefore, showing that the limiting reagent was iron. The iron oxidation state was iron (II) because iron (II) sulfate was formed during the reaction. The percent yield of the reaction was 106.7%. Introduction Literature sources The purpose of this lab was to use techniques of quantitative transfer and vacuum filtration. Two other objectives were to identify a limiting reagent by an experimental procedure and calculate the percent yield of a reaction
Examination - Advanced Level Chemistry (Salters') - Paper 3 mock. ROBERT TAYLOR U6JW. A Catalyst is a substance that alters the rate of a reaction. The catalyst remains unchanged at the end of the reaction. The process is called catalysis. In this report I aim going to explain the role of catalysts in chemical reactions and their importance in industry. I will also outline the problems associated with the use of some catalysts and discuss, using appropriate examples, new developments in this area
Chemical Composition of Cells Lab Report Tyler Thomason September 14, 2015 Introduction A cell, the building block of all living organisms, is composed of four fundamental biomolecules: proteins, carbohydrates, sugars and lipids. Proteins provide a vast amount of functions cells such as they serve as enzymes, provide structural support to cells, and act as antibodies. Reagents are used to spark a chemical reaction. The reagent used to detect protein traces in a
LAB REPORT Introduction All living things contain organic molecules such as lipids, carbohydrates, proteins and acids. In order to detect the presence of carbohydrates, proteins and lipids we have to do experiments. The Iodine test is used to detect the presence of carbohydrates. This test is used to distinguish starch (polysaccharide) from carbohydrates. Reaction between starch and Iodine produce a dark grey, black color and it means that the test is positive. A yellow color means that test
Abstract: In this lab report two unknown substances will be tested. The tests performed were looking for the presence of the main biomolecules, Carbohydrates, Lipids, and Proteins. The tests used will be used in the Lab report are; The Benedicts test to test for sugars, the Iodine test for coiled or non-coiled carbs, The Grease-spot test for lipids, and the Biuret test for proteins. Tests show that both substances had different responses to the Benedicts test. Both substances shared the same response
with 1 M nitric acid, rinsed with double distilled water (DDW) and dried before use. Acid washed filters may also be used for other non-volatile extracts. 6. pH meter: Calibrated to within ± 0.05 pH units at 25°C. • Reagents All reagents should be of recognized analytical reagent grade. 1. Nitric Acid, 1M 2. Hydrochloric Acid, 1M 3. Sodium Hydroxide, 1M 4. Glacial Acetic Acid • Extraction Fluid Extraction fluid No 1: Add 5.7 ml of glacial acetic acid to 500 ml DDW, add 64.3 ml of 1 M NaOH
Devyn Dubose Class Bio301 January 28th. 2016. 2:00 pm Title: Objective: The purpose of this experiment was to test various materials, using benedicts reagent, iodine, and biuret reagent Hypothesis: If you were to heat a substance and the color were to change to black then it will be an organic substance If Benedicts is added to different substances a chemical reactions occurs which causes the substances to turn red-brown. If the testing material contains starch it will turn a black-blue color when
reaction. In the lab we used Biuret reagent to test for proteins, iodine solution to test for starch, paper to test for lipids. In the first lab, we tested for the presence of proteins in samples by using blue solution called Biuret reagent, which changes to purple when a protein is present and pinkish-purple for peptides. First test tubes were marked at 1cm and then filled to the mark with water, albumin, pepsin, and starch. Next, five drops of Biuret reagent was added to the sample, covered with
3. OOS investigations which identify a laboratory error are tracked and trended by the Quality Assurance Unit (QAU) as part of the laboratory’s Non-Conformance Report (NCR) and CAPA program. 3. Definition CAPA; are improvements to processes taken to eliminate causes of non-conformities or other undesirable situations Non-conforming report; is to make an unambiguous, defensible, clear and concise definition of the problem so that corrective action can and will be initiated by management. 4. Responsibility: