Safety Concerns in the Laboratory Safety goggles must be warn at all times during a lab session. This is very important because they protect your eyes from harmful matter such as chemicals‚ glass‚ and fumes. It is very important to note that they must be goggles and not glasses. Safety glasses may protect the eyes from flying debris and splashes but may not protect the eyes from gas fumes or splashes from underneath. Also‚ wearing contact lenses in a chemical laboratory without proper coverage
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Lab Experiment 8: Oxidation Puzzle Post Lab Report for 2-ethyl-1‚3-hexandiol Calculations Theoretical yield: 1.857g Product Yield: 1.055g ----> Percent yield = (1.055g/1.87g) x 100% = 56.41% Starting amount of diol: 1.184g ----> Percent Yield = (1.184g/1.87g) x 100% = 63.32% Spectroscopy O-H (Stretch‚ H-bonded) C-H (Stretch) C-H (2720-2820 cm-1) Carbonyl C-O (Stretch) Product wavelength cm-1 3422 Strong‚ Broad 2877‚2936‚2964 Strong‚ Medium None Present 1705 Strong
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Through Dialysis Tubing (a Semi-Permeable Membrane) I. DESIGN A. PROBLEM/RESEARCH QUESTION 1. How does increasing molarity of sucrose affect osmosis through dialysis tubing? B. VARIABLES 1. The independent variable in this lab is the molarity of sucrose each dialysis bag is filled with. The time (30 minutes)‚ the temperature (23C) and the type of dialysis tubing used are all constants. 2. The dependent variable is the final mass of the dialysis bag. 3
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February 25‚ 2013 Lab: Equilibrium of Forces Purpose/Objective: The objective of this lab was to test the first condition of equilibrium for a set of concurrent coplanar forces‚ prove Lami’s Theorem‚ and to determine an unknown mass using rules of equilibrium. Procedure: In the lab‚ we wanted to find at what angles three separate weights would create a net zero force on a force table so that the ring holding the weights was exactly centered in the middle
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Introduction: During this unknown lab report various test were performed to differentiate microbes from each other and to compare metabolic and biochemical process. The gram stain distinguishes between Gram positive and Gram negative bacteria based on the composition of the cell wall. The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring these cells red or violet. Gram positive bacteria stain violet due to the presence of a thick layer of peptidoglycan
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Ashley Robins 9/13/11 Honors Chemistry Period 4 Density Lab Purpose: 1. To determine the density of a solid using different laboratory techniques for measuring volume. 2. To use the intensive property of density to identify an unknown substance. Procedure: 1. Obtain a bag marked with a number containing a cube and a cylinder from the teacher. Record the number on the bag in the data table. Density of a cube: Using a balance‚ record the mass of the cube to the nearest tenth of a gram
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Crystallinity of SAPO-5 With Molar Composition The given mixture composition (Al: 1.3 P: 0.8Si: 1.2TEA: 100H2O ; Al: 1.3P : 0.05Si: 1.2TEA: 100H2O ; Al: 1.3P : 0.05Si: 0.2TEA: 100H2O) is used to study the overall effect of silicon in AFI framework.The SiO2 magnitude is varied mole ratio from 0 to 1.0 of the given SiO2 to Al2 .The crystals SEM images that is obtained by using various contents of silicon are representing the sample produced in the absence of silicon in reactant gel is similar to the
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structure. After fully converting to martensitic‚ steels are tempered to achieve right amount of ductility and hardness. The ability to form martensite on quenching is called hardenability. Both hardness and hardenability solely depends on the composition of metal and the geometry of specimen. In this experiment‚ the specimen (X-10) is heated above the austenitizing temperature and then quenched in the cold water to form martensitic structure. The hardness is then measured at intervals from quenched
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Lab 2 Sara Rodriguez Period 2 Purpose: What is the more accurate way to measure volume‚ by using displacement or by using a ruler? Hypothesis: If the method of displacement is used ‚ then the results will be more accurate than measuring the volume using a ruler. Materials: -250 mL graduated cylinder -Triple beam balance -A weigh boat -Ruler -Samples Procedure: 1. Gather materials such as ‚ samples‚ weigh boat‚ triple beam balance ‚ graduated cylinder‚ ruler and water. 2. Take the materials
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Allee1 Eric Allee Professor McCrary Rhetoric and Composition 22 April‚ 2013 Organ Donation Many citizens constantly see television shows and media that negatively portray organ donation. One prime example comes from the new hit series‚ Nip Tuck. Nip Tuck has a storyline built around this image of beauty through plastic surgery while working with an underground kidney market. Many patients in this show wind up being murdered in some cruel intentional way just for a single kidney. Not only does
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