GRAVIMETRIC DETERMINATION OF SULFATE Purpose You will be given a solid powder‚ which has been dried to constant mass. The sample is water soluble. The purpose of this experiment is to determine the concentration of sulfate in your solid sample using gravimetric analysis. Background Gravimetric Analysis The goal of most quantitative chemical analysis measurements is to estimate the relative abundance of an analyte in a chemical sample. For solid and liquid samples‚ a very common expression
Premium Analytical chemistry Solubility
Calorimeter Determination of Reaction Enthalpy 9/11/2014 Introduction: A chemical reaction often indicated by a transfer of energy measured in heat. By measuring this heat transfer in a constant pressurized environment‚ the enthalpy of the reaction can be used to infer certain information about a specific reactions reactants and products. The transfer of heat from outside sources in would be described as an endothermic reaction. Contrary‚ when a reaction releases heat out to its surroundings
Premium Thermodynamics Energy Enthalpy
Zinc oxide in a mixture with a about 0.5% iron(III) oxide (Fe2O3) is called calamine and is used in calamine lotion. There are also two minerals‚ smithsonite and hemimorphite‚ which have been called calamine historically (see: calamine (mineral). Zinc peroxide‚ ZnO2 .½ H2O‚ is a white to yellow powder that is used in antiseptic ointments. Zinc white is used as a pigment in paints and is more opaque than lithopone‚ but less opaque than titanium dioxide. It is also used in coatings for paper
Premium Ultraviolet Sunscreen
Adsorption by Powders and Porous Solids Principles‚ Methodology and Applications Frangoise Rwqu~ra& Rouquerol and ’lean Hennet%Sing Centre de Therrnodynamique et de Microcalorimktrie du CNRS and Universite ’ de Provence‚ 26 rue du l4lLme RIA 13003 Marseille France ACADEMIC PRESS San Diego London Boston New York Sydney Tokyo Toronto This book is printed on acid-free paper. Copyright Q 1999 by Academic Press All rights reserved. No part of this publication may be reproduced or transmitted
Premium Adsorption
6: The Copper Cycle CHEM 101 Lab-M/630 As an investigation of the copper cycle lab group 6 conducted an experiment on 6 October 2014 at Arizona State University laboratory that would demonstrate the cycle of reactions that copper (Cu) can produce when introduced to with other substances/reactant. The purpose of the investigation was to notice the transformation of a specific quantity of copper wire (g) as it undergoes its coordination reactions until a reduction method would yield copper (Cu) again
Premium Chemistry Copper Chemical reaction
Changing the Rate of Reaction PART 1: PARTICLE SIZE Question: How does changing the particle size of marble (CaCO3) affect the rate of reaction when it is added to hydrochloric acid (HCl)? Hypothesis: If I change the particle size of marble to test how to change the rate of a chemical reaction‚ than the chemical reaction with the smallest marble particles will produce CO2 the quickest because the larger the surface area‚ the more place the hydrochloric acid will have to collide with the marble
Premium Hydrochloric acid Chemical reaction Chemistry
explore the cycle of copper through many chemical reactions. What we are going to do is take a piece of copper metal put it through a series of reactions that change it¡¦s state of matter and chemical formula‚ but in the end‚ we will return it to it¡¦s normal solid state. Determine the percentage yield (quantitative). Define what happen at level of electron for oxidation/reduction‚ double replacement‚ neutralization and decomposition. There are five reactions that the copper will go through. 1
Premium Chemical reaction
Simultaneous determination of copper‚ zinc and lead by adsorptive stripping voltammetry in the presence of Morin E. Shams a‚∗ ‚ A. Babaei b ‚ M. Soltaninezhad b a Institute for Advanced Studies in Basic Sciences‚ Zanjan 45195-159‚ Iran b Department of Chemistry‚ Arak University‚ Arak‚ Iran Received 24 November 2002; received in revised form 5 September 2003; accepted 15 September 2003 Abstract A sensitive and selective method for the simultaneous determination of copper‚ zinc and lead is presented
Premium Analytical chemistry Copper Lead
Abstract This lab is performed in order to determine the total energy in a reaction between zinc and hydrochloric acid. The reaction is done twice‚ once to measure the heat of the reaction and again to determine the work done in the system. This is because Enthalpy equals heat plus work (∆H= ∆E+W). Heat and work can be broken down further into separate components so the equation used in lab is ∆H=mc∆T + PV. Many calculations are used in the lab to find out what cannot be measured directly (ex:
Premium Thermodynamics Energy Temperature
there is nothing stronger than a bond between a father and his son. The trying and heartwarming relationship between the father and his son is shown in the story “Powder” by Tobias Wolff. There are many differences and similarities between the father and his son‚ maybe a few more differences than similarities but that doesn’t stop them from spending time with each other. To begin with‚ throughout the story the reader makes it clear the differences between the two characters. First off‚ the father
Premium Family Mother Tobias Wolff