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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Fishman Period 11 TCA #3 TITLE: Egg Shell Lab OBJECTIVE: To determine and compare the amount of calcium carbonate content of brown and white eggshells. MATERIALS: white and brown eggshells‚ water‚ deionized water‚ beaker‚ pipet‚ flask‚ test tube brush‚ funnel‚ hotplate‚ mortar‚ pestle‚ ethanol‚ HCl‚ phenolphthalein indicator‚ sodium hydroxide PROCEDURE: (Complete for both white and brown eggshells) 1. Get one egg and beaker and bring it to your lab station. 2. Break the egg into a beaker.
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CHEM 17 Expt.2-Coupled Reactions 4/18/12 Results and Discussions: One way to obtain products from a non-spontaneous process that is exhibited in this experiment is by “coupling” two reactions. The principle of Coupled Reactions is based on a simple concept: we can use a thermodynamically favorable (spontaneous) reaction to drive an unfavorable one. One step is allowed to supply enough free energy for the other to occur. A coupled reaction is a system wherein a non-spontaneous
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Module Nine: Lab Questions ● ● ● ● ● ● ● ● ● 1. Which technique is the best choice when blood is found at a crime scene? In the genetics laboratory (under "resources" at the bottom of the window)‚ who is one individual that contributed to modern genetic analysis? What did this person contribute? Analyzing the blood in a lab would be the best technique‚ Alec Jeffrey’s is known as the father of genetic profiling. He invented what is now an essential technique. Also he linked a murderer to two young girls
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CHEM 2303 ANALYTICAL CHEMISTRY II LECTURE 2 – APPLICATIONS OF SPECTROPHOTOMETRY TENTATIVE LECTURE SCHEDULE Date Topics • Presentation / discussion of syllabus • Tips for success • Laboratory • Introduction to the analytical process • Sample preparation Jan 9th‚ 2015 • Spectrophotometry • Properties of light • Absorption of light • Excited states • Luminescence • Applications of spectrophotometry • UV-Vis spectroscopy • Fluorimetry Jan 16th‚ 2015 • Fluorescent staining‚ green fluorescent protein
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CHEMISTRY 17 1ST LONG EXAM REVIEWER I. ELECTRONIC STRUCTURE OF ATOMS -arrangement of atoms’ electrons -the number of electrons in an atom -distribution of electrons around the nucleus and their energies • ATOMS *Billiard Ball Model (JOHN DALTON) *Plum Pudding Model (JOSEPH J. THOMPSON) *RUTHERFORD’s Model of Atom -atoms are tiny‚ hard‚ indivisible spheres -electrons (negative charge) occupy the atom - Atom is mostly empty space with a dense nucleus • PROBLEMS with Rutherford’s Model
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EXPERIMENT 1: Proteins -polypeptides compose of > 50 amino acids Functions 1. Enzymes or subunits of enzymes-enhancing the rates of reactions 2. Structural or Mechanical roles 3. Immune response roles 4. Storage and transport of substances 5. Source of amino acids for organisms that cannot synthesize amino acids naturally ISOLATION- disruption of cell membranes to release cell contents; separation for other contaminants 1. CENTRIFUGATION 2. SALTING OUT-water
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INTERNATIONAL BACCALAURÉAT BACHILLERATO c BACCALAUREATE INTERNATIONAL INTERNACIONAL MARKSCHEME May 2002 CHEMISTRY Standard Level Paper 3 12 pages M02/420/S(3)M+ –5– Subject Details: M02/420/S(3)M+ Chemistry SL Paper 3 Markscheme General ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Each marking point is usually shown on a separate line or lines. Alternative answers are separated by a slash (/) – this means that either answer is acceptable. Words underlined are essential for the mark. Material
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Vanden Eynden CHM2510 AU13 Practice Midterm Exam #2 CHM2510 Practice Midterm Exam #2 This exam is designed to give you a small glimpse as to the format of the exams I write. The content of the exam has no direct correlation to the difficulty of the actual exam you will take. Use this exam as another problem set so you can get a little more practice in where multiple chapters are combined into one document. It would greatly benefit you to try doing this exam first WITHOUT ANY NOTES
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