Since the Grignard reagent can easily react with water‚ all glassware including the 25 ml round bottom flask‚ magnetic stir bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed
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Purpose: To find out the densities and to find out the name of the unknown metals. (Based on the extensive and intensive properties) Check up the words mass‚ volume‚ density‚ extensive properties‚ and intensive properties. Where do the units for mass and volume) come from and what do they mean? What is the density of distilled water? What is Archimedes principle? Does temperature affect the density of a solid? Liquid? Gas? Materials: Safety glasses‚ 10‚ 25 or 50 mL graduated cylinders
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Title : Measuremnt of pH With Indicators Aim : 1.To investigate concentration of hydrogen ions in hydrochloric acic and colour changes of indicators 2.To determine standard solutions and the unknowns Variables Independent variable : Concentration of hydrogen ions in hydrochloric acid.The presence of hydrogen ions is varied by using 5 different concentration of hydrochloric acid of 0.1mol/L‚0.01mol/L‚0.001mol/L‚0.0001mol/L‚0.0000mol/L Dependent variable : Colour changes of indicators
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Acetic acid MSDS. 2012. “Material Safety Data Sheet Acetic acid MSDS.” Accessed September 3‚ http://www.sciencelab.com/msds.php?msdsId=9922769 Chemlab. 1997-2000. “Chemlab-glassware-burets.” Darmouth College. Sienko‚ Michell and Robert Plane. 1957. Chemistry. McGraw-Hill Book Company‚ Inc.
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Table 8.1- Combustion of magnesium ribbon Observations Reaction was exothermic; magnesium ribbon burned and was glowing a bright white color when ignited. Reactants: Mg and O2 Products: MgO Balanced chemical equation 2Mg + O2 2MgO Table 8.2- Combustion of heptane Observations When holding test tube inverted over heptane flame‚ condensation formed against top walls of the test tube. When the burning splint was added the walls of the test tube became less foggy from the condensation
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CHEM 2123 and 2125 – Organic Chemistry Lab I and II GUIDELINES FOR WRITING LAB REPORTS INTRODUCTION Writing reports in organic chemistry lab may differ from the way it’s done in general chemistry. One goal of this course is to introduce you to the record keeping methods used in research labs. Such methods are designed to organize experimental data in a format similar to that required for publication in major scientific journals. Here are some important considerations that apply in research settings
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Lab #28 Conservation of Mass Ashleigh Bublinec Serena Contreras
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Joanna Park Mrs. Carrillo CP chemistry per. 5 September 17‚ 2012 i. Beverage Density Lab Report ii. Purpose: The purpose of this experiment is to determine the percentage of sugar content in beverages. iii. Materials: Distilled water‚ beverages (juice‚ soda‚ sport drinks)‚ Sugar reference solutions (0‚ 5‚ 15‚ ad 20%) 25ml each‚ Balance‚ centigram(0.01g precision)‚ Beaker (100-mL)‚ Erlenmeyer flask (125-mL to collect rinse solutions)‚ Pipet(10-mL)‚ Pipet bulb or pipet filler iv
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Standardization of Solution and Titration Lab Report‚ Preparing a Dilute HCl Solution from a Concentrated One Titrating NAOH Solution with HCl Solution (of Known Concentration) Chemistry lab report(by abdazino abdalla) International College Objective preparing a dilute HCl solution from a concentrated one titrating NAOH solution with HCl solution (of known concentration) Procedure Section A: Preparation of 100.0cm3 0.480 mol/dm3 HCl solution a)Determine the volume of the concentrated acid
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soil from the site and then take several other samples from different points on the site. This ensures variety of soil to ensure that all the site is safe‚ not just a small area where you would have taken your first sample from. I will return to the lab with the samples of soil I have extracted from the site. Here I will make a solution from the samples in order to carry out the identification tests. In order to turn my soil samples
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