layer contains sodium hydroxide and water‚ whereas the organic layer contains the dichloromethane‚ aspirin‚ and the unknown. If the HCl has nothing to react with in the aqueous layer following mixing (i.e.‚ sodium acetylsalicylate)‚ then little to no solid aspirin will be produced. Furthermore‚ more unknown would be produced than expected because aspirin would precipitate with the unknown during distillation. (c) Mistakenly extracting the dichloromethane solution with 5% HCl rather than 5% NaHCO3 would
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Copper Cycle Summary During the copper cycle lab‚ my partners and I performed a series of reactions on copper powder and observed the changes it underwent. For the first step‚ we mixed nitric acid and copper powder‚ and noticed that a yellowish brown gas emerged‚ along with effervescence. The red solid disappeared and became a blue liquid. We know that we produced copper nitrate‚ nitrate gas‚ and water because the only two blue solutions in “A New Language” are copper sulfate and copper nitrate
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By: Bahredin Ali Muzeyin Materials Engineering Department Adama Science and Technology University MAEng3301 October 15‚2013 Abstract Deferent carbon content steel examined to determine the microstructure‚ concentration and hardness of the specimens. 0.2% C‚ 0.4% C and 1.0% C steel specimens were prepared by cutting. Abrasive cutter was used to cut the steels. Furnace was used for heat treatment at 900°C to make the phases separate when seen
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Prof. Ioan Kosztin Lecture #23 Solid State Physics • Bonding in solids (metals‚ isolators‚ semiconductors) • Classical free electron theory of metals • Quantum theory of metals • Band theory of solids • Semiconductors • Lasers Classification of solids • Phases of matter: • solid (well defined shape and volume) • liquid (only well defined volume) • gas (no defined shape or volume) • plasma (an overall neutral collection of charged and neutral particles) • Solids • crystalline (atoms form a regular
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Explore the relationship between reactants producing a product and product breaking apart to its original reactant. Watch as both reactant and product reach a state of balance. No pressure greater than one another. Collision model provides characteristics of chemical reaction. Molecules must collide in order to react; and Characteristics such as higher concentrations‚ high temperature‚ etc. plays the role of increasing the speed of reaction or having more collisions. Scientists use collision model
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Lab Report Quiz!!! | | | LabRepQuiz010 Question MC #19: All are true of the Materials and Methods section except___.Answer | | | | | | | | | | * Question 2 1 out of 1 points | | | LabRepQuiz010 Question MC #7: Which of the following is the best written sentence that includes the information below taken from an article written by Dr. Costanza‚ but avoids plagiarism? -A decade of research from Sunshine Health Clinic has shown that 20 minutes of exercise a day can
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Laszlo Vass‚ Ed.D. Version 42-0027-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable
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encoded by EZH2‚ the EZH2 gene encodes part of the Polycomb group which make protein complexes that help to maintain genes transcriptional repressive state over successive cell generations. http://www.ncbi.nlm.nih.gov/gene/2146 Throughout this lab report template DNA that contains the gene EZH2 was provided‚ this will be amplified by a PCR and cloned into a vector. This Polycomb group proteins help maintain the cell identity during progress through chromatin
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CHM151LL Laboratory Report Form Fall 2011 Title: Project 5: SPECTROPHOTOMETRIC ANALYSIS OF A PENNY Date Run: 04/03/2012 Date Submitted: 04/15/2012 Grade: _____________________ Objectives: The purpose of this experiment is to use spectrophotometry to determine the percentage of copper in a copper-clad penny‚ and to determine the thickness of copper layer on the copper-clad penny. Introduction: In the spectrophotometric analysis of a penny lab‚ we will be conducting three
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of an object could be determined by the displacement of the liquid. Density is a property that will be consistent for any substance. For pure substances it is the same concept as concentration. For solutions of material density increases as the concentration increases. Many substances can be found by density alone‚ and concentration can be identified if the density is known. In this experiment‚ the experimenters found the density of solid objects and then the concentrations of solutions based on
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