Chemistry Essays

Every living thing is dependent on large complex molecules, known as macromolecules. The objective of this lab was to correctly identify which macromolecules the unknown solution was comprised of using various substances as experimental controls. There are four major types of biological macromolecules – carbohydrates, lipids, proteins, and nucleic acids …

In opposition to the perceptions of many people, a copywriter has to be in command with the language and has to be able to think outside of the box. In Making the Pitch in Print Advertising, authors Courtland L. Bovée, John V. Thill, George P. Dovel, and Marian Burk Wood …

The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment, a nitro group was used as the substituent …

The objective of this experiment is to determine the amount of sulphate by gravimetric analysis. The amount of sulphate is determined quantitatively as barium sulphate, BaSO4, by gravimetric analysis. For the experiment, a dilute solution of barium chloride was slowly added to a hot unknown sulphate solution slightly acidified with …

Various chemical tests identifying ketones and aldehydes are used in this experiment in order to identify an unknown carbonyl compound. The tests used are: 2,4-dinitrophenylhydrazone test, Tollen’s Test, Benedict’s Test, Chromic Acid Test, aka Bordwell-Wellman Test, Schiff’s Test, and Iodoform Test. These classification tests provide results based on color change …

1.Synopsis The objective of this experiment is to learn to re-crystallise aspirin and to prepare aspirin. To find out the purity of aspirin obtain by recrystallisation of prepared aspirin from reaction of salicylic acid with acetic anhydride. Purity can be determined by identify the melting point of aspirin. In this …

With the development of the light microscope many scientists were able to view microscopic objects such as cells. The first to accomplish this was Robert Hooke when he used a light microscope to observe a thin slice of cork. Hooke observed that the cork was made of tiny structures of …

The yield of a metal from a particular mineral or ore is the mass of metal that can be obtained from a particular mass of the mineral or ore, and is often expressed as a percentage. It is possible to use formulae to calculate/predict yields of metals from particular minerals …

I. Introduction In this experiment, the zinc and nickel contents of unknowns were tested using two methods. In the first method, nickel and zinc were separated through ion-exchange chromatography and analyzed through chelometric titration. In the second method, the unknown was analyzed through the atomic absorption spectroscopy (AAS) of the …

A dehydration reaction of an alcohol results in an alkene. This type of reaction requires an alcohol, an acid catalyst and heat. Generally strong concentrated acids, like sulfuric acid and phosphoric acid, are used as the acid catalyst.The acid catalyst protonates the alcohol, to make a much better leaving group. …