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 […]
Preparation and equilibration of isomeric 2,3-Dimethylbutenes By: Shannon Davis ABSTRACT: The first reaction that took place is a Grignard reaction where an alcohol was produced. The percent yield for this reaction was 62.5%. The ether and other impurities were taken out and the alcohol left was 82.89% pure with only .16% of ether. After the elimination reaction the product was mixture of 2,3-dimethylbutenes. The reaction had a percent yield of 93.04%. 1.61 g of “1-ene” and 5.38 g of […]
Preparation and Spectroscopic Characterization of the Classical Coordination Compounds Copper(II) and Silver(II) Picolinate. A Comparison of a First and Second Transition-Series Elements in the Same Family. By: Sara Adelman and Agust Olafsson Introduction: Coordination compounds are of immense importance in the biological and synthetic world and have a wide range of uses: from naturally occurring enzymes to synthetic drugs to indispensable industrial products1. The variety of uses of the coordination compounds is derived from their structural diversity. Classical coordination compounds have […]
