Restoring Balance LeChâtelier’s Principle and Equilibrium Introduction Chemical equilibrium is a true balancing act. What happens when the balance is disturbed? The purpose of this lab is to observe the effects of concentration and temperature on equilibrium and to visualize how balance can be restored based on LeChâtelier’s Principle. Background Not all chemical reactions proceed to completion‚ that is‚ to give 100% yield of products. In fact‚ most chemical reactions are reversible
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insoluble in water bromobenzene 157.02 -30.6 156.2 1.495 soluble in methanol/diethyl ether bromocyclohexane 163.06 -56.5 166 1.3604 insoluble in water bromocylopentane 149.04 n/a 137 insoluble in water Sodium Iodine in acetone 149.89 661 1304 3.67 soluble in acetone/ETOH Silver Nitrate in ethanol 169.87 212 444 4.35 soluble in water Calculations & Chemical Reactions: Sample Table: Compound Name SN1 SN2 Time for precipitant 2-chlorobutane y Y 2-bromobutane y Y 1-chlorobutane
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Essay #1 1. Mr. Sanchez makes an appointment to see his doctor for pain in his abdominal area. Tests and x-rays reveal kidney stones as well as bones with a moth-eaten appearance. Further questioning reveals a medical history of abnormal reflexes and weakness. What is the problem and what treatment would be recommended? Mr. Sanchez is suffering from hyperparathyroidism which is when the parathyroid glands secrete too much hormones. According to the medical website MedicineNet.com 85% of people
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below 100 degrees Fahrenheit. At normal room temperature‚ flammable liquids are a much greater fire hazard than combustible liquids. Flammables include lacquer thinner‚ turpentine‚ acetone‚ ether‚ alcohol‚ gasoline‚ toluene and shellac. For example‚ ethyl ether (a common solvent) has a flash point (FP) of –49 deg. F and acetone has a FP of 0 deg. F. Combustibles: These liquids have vapors which burn when heated above 100 deg. F. Combustibles include fuel oil‚ kerosene‚ mineral oil and paints. Flammable
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|granular zinc | |3.0 M NaOH (30 mL) |methanol | |carborundum boiling chips |acetone | |stirring rod |towel | |iron ring and ring stand |balance
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Chemistry 11 Santa Monica College Determination of Molecular Mass via the Dumas Method Objectives: • To determine the molecular mass of an unknown volatile liquid using the Dumas method and the ideal gas law. Background: In the early 19th century‚ Jean-Baptiste Dumas‚ a distinguished French chemist‚ created a relatively simple method for determining the molecular mass of a volatile substance. In this experiment we will use a modified version of his technique to determine the molecular
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Running head: Plastination Plastination Have you ever wondered how medical students get their knowledge on how they understand the human anatomy? I would believe in two ways. Books and Plastination. Books are a good reference that just shows pictures. Plastination would be the way to go. Plastination is a technique or a process used in anatomy to preserve bodies or body parts. It was first developed by Gunther Von Hagens in 1977. In November 1979 Gunther applied for
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Solubility and Functional Groups _______________________________________________________ You will recall from general chemistry that a solution has two components: the solvent‚ which is the substance present in greater amount‚ and the solute‚ which is dissolved in the solvent. Solubility is defined as the mass (in grams) of solute dissolved in 100 g of solute at saturation. Molar solubility is defined as the amount (in moles) of solute per liter of saturated solution. The solubility of one compound
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pigments would be present in the extracted plant leaf according to the Rf values. PROCEDURE/APPARATUS: The equipments used were a 18 x 150 mm test tube with stopper‚ graduated cylinders‚ Erlenmeyer flask‚ mortar and pestle‚ metric ruler‚ tall jar‚ acetone‚ tiny test tube‚ small brown bottle‚ petroleum ether‚ plant leaf‚ dried parsley flakes‚ water‚ glass petri dish‚ stapler‚ sand‚ spatula‚ pipette‚ capillary tube‚ Whatman filter paper‚ a 50 ml chromatography solvent‚ and goggles (to be worn at all
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“Star Apple Leaves as Paste” An Investigatory Project Presented to the Class of Mr. Marjim Dela Cruz Biological Science NS2 Presented By Nathaniel Abaya Sanchez September 12‚ 2014 “Star Apple Leaves as Paste” A. Purpose It makes my study important cause it can be used in many ways‚ such as pasting works‚ decorating‚ painting & other things. Also its not expensive but it can give us low price. Like other paste or glue‚ it also useful in our economic.. B. Procedure First‚ you should
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