Process Description Acetaldehyde is produced via dehydrogenation of Ethanol. The reaction is as below: CH3CH2OH CH3CHO + H2 ‚ ΔH = +82.5 kJ/mol Besides the main reaction producing Acetaldehyde‚ there are three side reactions present in the reactor‚ as shown below: 2 CH3CH2OH CH3COOC2H5 + H2 2 CH3CH2OH CH3(CH2)3OH + H2O CH3CH2OH + H2O CH3COOH + H2O The feed of 90% Ethanol is kept in a storage tank with an air vent. Tank blanketing is used in the storage tank with Nitrogen gas. This
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Percent By Mass Solution Problems 1. What is the percent by mass of a solution made by dissolving 0.49 g of potassium sulfate in 12.70 g of water? 2. What is the percentage concentration of 75.0 g of ethanol dissolved in 500.0 g of water? 3. A chemist dissolves 3.50 g of potassium iodate and 6.23 g of potassium hydroxide in 805.05 g of water. What is the percentage concentration of each solute in the solution? 4. A student wants to make a 5.00 % solution of rubidium chloride
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The organic topic to be discussed: n-Nitrosamines The organic molecule to be discussed: n-Nitrosodimethylamine‚ Nitrosopyrrolidine During these few decades‚ more nitrogen-based chemicals‚ like nitrites and secondary amines‚ were added to our food‚ which lead to be a suspect reason of increasing Alzheimer’s cases. The nitrogen-based chemicals can be transformed into toxic chemical‚ n-Nitrosamines‚ under acidic environment or high temperature while cooking. Scanlan RA states that the most
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CHEM 2018 Organic Lab Part 2 Experiment 7: Diethyl n- Butylmalonate Lab Partner: Reference: Williamson K.L.‚ & Masters
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The Effect of Varying Molecular Weights on the Rate of Diffusion of Substances August 22‚2012 ABSTRACT The effect of molecular weight on the rate of diffusion was verified by the 2 tests: the glass tube setup and the water agar-gel setup. In the glass tube setup‚ two cotton balls were soaked in the solutions of hydrochloric acid (HCl) and ammonium hydroxide (NH4OH) and were simultaneously placed on both ends of the tubing.NH4OH had a lighter molecular weight of 35 g/mole which diffused
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Separating a Mixture of Compounds Exp. No. 2 name Chemistry 145 February 2‚ 2014 I. Purpose The purpose of this experiment was to separate this mixture into components‚ determine the mass and percentage of each component. In addition to test the accuracy of an alternative method of subtraction to find the mass of the sodium chloride directly. Start with a mixture of sand (SiO2)‚ sodium chloride (NaCl)‚ and ammonium chloride (NH4Cl)‚ and use these separation processes: sublimation filtration
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Beryllium and magnesium These are just like the reactions with dilute hydrochloric acid‚ and you have probably been familiar with the reaction between magnesium and dilute sulphuric acid almost since you started doing chemistry. Bubbles of hydrogen are formed‚ together with colourless solutions of beryllium or magnesium sulphate. For example: Calcium‚ strontium and barium Calcium sulphate is sparingly soluble‚ and you can think of strontium and barium sulphates as being insoluble
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Valuable Experience Gained During the Training Period The valuable experience that I gained during the training is when we are in the furnace of the boiler where the combustion takes place. The furnace is a internal parts of the boiler so we are taking the advantage to see what’s inside the boiler. We saw the generating tubes‚ bunker fuel injector‚ grates that we need to fix because of mis-alignment of the grates base. Grate is use for de ashing to avoid clogging up of the boiler. The second
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1_____2_____3_____4_____5_____6_____7_____8_____9_____TOTAL________ CHEM 237‚ FALL 2007 HOUR EXAM 1 Name________________________________________________________ TA Name _______________________ __& Section # _________________ Student #______________________________________________________ 1. (9 pts) Write a valid Lewis structure for each of the following. Show lone pairs and formal charges where necessary. Draw covalent bonds as lines. (a) bisulfate ion‚ HSO4- O HO S O (b) hydrogen cyanide
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Effect of Temperature on Solubility of a Salt Ahmed Mohammed 17-nov-2013 Abstract In this experiment‚ you will study the effect of changing temperature on the amount of solutet will dissolve in a given amount of water. In this experiment‚ you will completely dissolve different quantities of potassium nitrate‚ KNO3‚ in the same volume of water at a high temperature. As each solution cools‚ you will monitor temperature using a computer-interfaced Temperature Probe and observe
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