Acetylsalicylic Acid Synthesis By: Elizabeth Renteria Theory. This experiment was carried out to see how the hydroxyl group on the benzene ring in salicylic acid reacts with acetic anhydride to form an ester, and to make aspirin. Synthesis of Acetylsalicylic Acid occurs by protonation of carbonyl (C=O) group, and a nucleophilic attack of OH on the acetic anhydride. The ferric chloride test and melting point were used to test the purity of the results. A hypothesized recovery rater of above […]
Abstract Polyaniline was successfully synthesised using cyclic voltammetry. The redox properties of emeraldine base, a polyaniline derivative, were explored, and it was proved using UV-Vis spectroscopy that emeraldine salt exists in a coiled form when using DMF as a solvent, but in the extended chain form in m– cresol. Introduction Inherently conducting polymers (ICPs) are electrically conducting polymers that can by synthesised by the chemical (or electrochemical) oxidation of suitable monomeric materials. One of the most studied ICPs is polyaniline […]
Abstract Solutions of chloroauric acid and silver nitrate were reduced using sodium citrate to form nanoparticles of varying composition, whose optical properties and physical dimensions were measured, giving the result that the molar extinction coefficients of the solutions increased exponentially with decreasing mole fraction of gold in solution. Introduction The interest in nanoparticles has grown exponentially over recent years, as scientists strive to explore the variance in electronic, optical and chemical properties with particle size. In this experiment, gold nanoparticles […]
Preparing Standard Acid and Base & Finding Molarity By: Arturo Morillo Introduction: The purpose of this laboratory is to learn how to prepare the standard acid and base that will be used in the laboratory. These acid and bases will be used throughout the laboratory. By standardizing them, we are able to calculate their exact concentrations. We will be using potassium hydrogen phthalate to determine the concentration of sodium hydroxide. Four trials will be taken to to calculate the concentration […]
Preparation of Alum from Aluminum Metal By: Rachel Buckley, Alexa Kirchharr Abstract: The purpose of this experiment, Preparation of Alum from Aluminum Metal, was to extract alum from aluminum metal, and to find the percent yield of the alum from the aluminum metal. The experiment was carried out through a series of processes using aluminum foil, potassium hydroxide, and sulfuric acid. Materials and Methods: The first part of this experiment was to dissolve the aluminum foil in 1.5 M […]
