Physical chemistry

Abstract A Friedal-Craft reaction was performed to synthesize 1,4-di-t-butyl-2,5-dimethoxy-benzene from p-dimethoxybenzene and t-butyl alcohol. The product of the reaction was filtered using a Hirsch funnel, before recrystallizing and filtering a second time. The recorded mass of the product was .08g and the melting point was 47-52.7 °C. Introduction1 This experiment was designed to practice working with electrophilic aromatic substitution reactions. Specifically, a Friedel-Craft reaction was…

considered all other elements that were soon to be discovered were an antiquity. The scientists did not know much about how the elements worked or what made them different from one another. The time period around the nine-teenth century, the field of chemistry had only about fifty known elements. This is a very limited knowledge of the elements, compared to todays knowledge. Advancements in technology was making discovering elements much easier. By 1869, the world had discovered about…

The goal of the lab was to identify an unlabeled compound found in the chemistry stockroom to be able to dispose of it properly. This lab demonstrated the process of identifying an unknown compound as well as synthesizing the compound. Identifying the compound consisted of performing various tests to detect the chemical and physical properties of the compound and comparing it to the list of possible compounds. The tests conducted were the solubility test which the compound fully dissolved in…

Aeshah Alrubayyi CHM 643 Reactive intermediate has been important investigated in physical organic chemistry. It classes to carbocations, carbenes, carbanions and free radicals. Recently, observable intermediate classified as reactive, and an unobservable intermediate is kinetically when occurs at a branch point in a mechanism. A reactive intermediate is formed in the rate determining step of a reaction and then goes to give products in low barrier. Also, the hydrocarbon reaction of terminal…

The Law of Conservation of Mass is a system where an isolated system cannot be created or destroyed by a chemical reaction or physical transforms. (from the website: https://courses.lumenlearning.com/introchem/chapter/the-law-of-conservation-of-mass/).The Law states that mass of products in the reaction must be equal to the reactans or the things that causes the reactants.Again from the same website.The History behind it is that the Greeks were the first to come up with the idea,but it wasn’t…

Kate Byrne DT299/4 CHEM 4128 Applied Physical & Analytical Chemistry Assignment Liquid Chromatography High Resolution Mass Spectrometry Hyphenated Techniques The term “hyphenated technique” was introduced by Hirschfeld in 1980. It refers to the combination of a chromatographic separation technique and a spectroscopic detection technique to form a new, more efficent instrument. The technique which will be discussed in this case is LC-MS. The aim of combining both techniques is to purify and…

is fully dissociated in aqueous solution. For intermediate to strong solutions of hydrochloric acid, the assumption that H+ molarity equals HCl, is a very accurate due to the complete ionization of HCl. Of the six common strong mineral acids in chemistry, hydrochloric acid is the monoprotic acid least likely to undergo an interfering oxidation-reduction reaction. It is one of the least hazardous strong acids to handle; despite its acidity, it consists of the non-reactive and non-toxic chloride…

communication skills. Therefore, I am looking forward hearing from an expert how to be intelligent in an own career field. Chemical engineering is a branch of physical sciences (physics…

Introduction Experiment five was a two-part experiment meant to have us practice our skills and then use those skills in actual data collection and analysis. In part one we used a sample of sodium saccharinate combined with a sample of a metal halide salt, our group used copper(II) chloride. The combination of these two samples allowed for the synthesis of a metal complex. In part two of the experiment we used a procedure similar to part one in order to collect phosphorus out of a sample of…

Brønsted–Lowry Left hand side: Johannes Nicolaus Brønsted (1879 - 1947) Right hand side: Thomas Martin Lowry (1874 - 1936) THEORY An acid is a proton (H+) donor A base is a proton (H+) acceptor EXPLANATION OF THE THEORY: Acids are proton donors and bases are proton acceptors. A hydrogen ion is the same thing as a proton since hydrogen consists of a proton and an electron. When hydrogen loses an electron all that is left is a proton. According to the Brønsted-Lowry theory of acids and…