Acetic anhydride

This seminar was presented by Dr. Robert B. (Barney) Grubbs, who is an Associate Professor of the Department of Chemistry at Stony Brook University. Also, Dr. Grubb has been a professional scientist at the Center for Functional Nanomaterials at the Brookhaven National Laboratory (2009-2014). On his presentation Dr. Grubbs explained how, through synthesis it is possible to control the structure and properties of molecules to create functional materials. In order to obtain these functional materials

Experiment 22 FeSCN+2 Formation Constant By Kendra Dykstra Chem 114-05 Eman Shams February 3, 2017 Katie Lucas The formation constant of FeSCN+2(aq) was determined through the use of the visible spectrophotometric measurements. This was then used to determine the enthalpy or ΔH° and entropy or ΔS° of the reaction. The adjusted Kc experimental value was determined to be 148 ± 7.2 compared to the known value of 146. This shows a percent error of 1.37% which is good. Enthalpy was determined

2.4 Evaluation of colitis on survival rate and body weight Survival rate and body weight were two index during the evaluation of the severity of colitis [19, 20]. The survival rate and body weight was recorded daily during the administration of TCA. 2.5 Evaluation of colitis on the change of colon The severity of colitis was evaluated by the presence of colonic weight, colonic length, and colonic damage of macroscopic scores. Macroscopic scores for evaluation of the severity of colitis was performed

A common problem that scientists encounter in chemistry is that two or three compounds are mixed together and they have to perform the purification and extraction to identity the single compounds that mixture contains. In order to separate the components of a mixture, various techniques can be used such as sublimation, evaporation, extraction, filtration, decantation, and more. In this lab, benzoic acid, benzocaine, and 9-fulorenone were mixed and acid-base extraction, separatory funnel extraction

Super Absorbent Polymer (SAP) Material Introduction SAP or called Super Absorbent Polymer is used for absorbing liquids. Some of its real life uses are for cleaning up spills in the kitchen, in adult incontinence products and feminine hygiene products.1 Materials 1) 2 - 2 Oz cups 2) 1 - 9 Oz cup 3) Shot cup 4) Water 5) Measuring items Data Collection and Outcomes 9 Oz Cup For the 9 Oz Cup, we placed a ¼ teaspoon of SAP into it, then places ½ a cup of water into the 9 Oz Cup and stirred it. Upon

What is the Concentration of Acetic Acid in Each Sample of Vinegar? Throughout this Acid-base titration and neutralization reaction lab, the goal was to determine the concentration of acetic acid within three given samples of vinegar. This titration is based on the argument that acids and bases neutralize each other when they are mixed together using an exact stoichiometric ratio. During this investigation we determined the concentration by performing an acid-base titration with the use of an

During this experiment, the process of extraction of a solute from one solvent into a second solvent took place. A sample of Phensuprin, which contains sucrose, acetanilide, and acetylsalicylic acid, is mixed with dichloromethane until the sucrose turns into a solid, leaving the acetanilide and the acetylsalicylic acid in the dichloromethane solution. Then, with the use of a separatory funnel, the dichloromethane solution is mixed with sodium bicarbonate. Two layers’ form, the aqueous layer is cooled

1. Henderson-Hasselbalch equation, from page 96 in the textbook: pH = pKa + log [A-] / [HA] For histidine, pKa = 6. At pH = 7: 7 = 6 + log [A-] / [HA] 1 = log [A-] / [HA] 10^(1) = 10^(log [A-] / [HA]) 1 = [A-] / [HA] Ratio is 1:1, thus 50% of histidines in a protein will likely be protonated in an environment of pH = 7. At pH = 7.4 7.4 = 6 + log [A-] / [HA] 1.4 = log [A-] / [HA] 10^(1.4) = 10^(log [A-] / [HA]) 25.119 = [A-] / [HA] Ratio is 25.119: 1 . Percent: 1/ (1 + 25

overall purpose of this lab was to synthesize isopentyl acetate from glacial acetic acid and isopentyl alcohol. These two were combined to ultimately give a clear solution. When sulfuric acid was added to the solution this was where we seen the mixture turn to a brown color. Here was where a polymer was formed. The hardest part about this lab was separating all the components that were in the flask. This included acetic acid, sulfuric acid, water, and isopentyl alcohol. To isolate the isopentyl acetate

What do the Rf values reveal and conclusion The Rf Values highlight that the separate of chlorophyll evidently works better on Paper chromatography due to the polar and nonpolar molecules and depends on how soluble and less soluble the compounds are as polar molecules only dissolve in polar solvents and nonpolar only dissolve in nonpolar solvents this could be why the chlorophyll didn’t travel as far on the silica plate due to the certain solvent what was used. Additionally, as the solvent reaches