CHM151LL Laboratory Report Form Fall 2011 Title: Project 5: SPECTROPHOTOMETRIC ANALYSIS OF A PENNY Date Run: 04/03/2012 Date Submitted: 04/15/2012 Grade: _____________________ Objectives: The purpose of this experiment is to use spectrophotometry to determine the percentage of copper in a copper-clad penny‚ and to determine the thickness of copper layer on the copper-clad penny. Introduction: In the spectrophotometric analysis of a penny lab‚ we will be conducting three
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Designation: C 114 – 07 Standard Test Methods for Chemical Analysis of Hydraulic Cement1 This standard is issued under the fixed designation C 114; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 These test methods cover
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OBJECTIVES: To determine the maximum wavelength of potassium permanganate. To plot the calibration curve of potassium permanganate. To determine the concentration of an unknown solution of potassium permanganate. INTRODUCTION: UV Spectrophotometer has 4 main components which is the UV light source‚ the sample‚ detector and the processor/recorder. Spectrophotometry is a technique that uses the absorbance of light by an analyte (the substance to be analyzed) at a certain wavelength to determine
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water transferred from a buret to a beaker‚ to determine the experimental mass of the water‚ and the volume of the water collected. We measured the temperature of the water so we could calculate the density of the water‚ which enabled us to calculate the actual volume of water‚ by using the density and the measured volume of water. To determine the percent error‚ we had to subtract the actual volume of water by the experimental volume of water transferred from the buret to the beaker‚ and then divided
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different results than other groups‚ i.e. different measurements for samples. Our sources of error could have included eye measurement error‚ timing of set solutions error‚ measurement errors‚ and small calculation errors. Among other variables‚ the calibration of the analytical balance and spectrophotometer could have been off slightly‚ yet our results‚ like most other groups‚ still followed the general trend line generated by the graph using Beer’s Law. The measurement errors could have occurred due
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Experiment # 1 Date: 18/12/13 Title: Chemical Properties of Alkanes. Aim: To test the reactivity of alkanes using cyclohexane as an example. Apparatus/Materials: Cyclohexane‚ liquid alkane‚ aqueous bromine‚ test tubes‚ light source‚ watch glass‚ splint‚ 0.1 MKMnO4‚ concentrated H2SO4‚ dilute H2SO4. Method: Combustion: 1. A watch glass was placed on a benched protection sheet in a fume cupboard and the extractor in the fume on. 2. 4 drops of cyclohexane was placed on the watch glass using
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Quantitative Chemical Analysis Lab Chemistry 223 Dr. Dean Olson Fall Semester 2013 Friday‚ August 30 Who Am I? B. Chem. – U. of Minnesota‚ Minneapolis M.S. – U. of North Carolina‚ Chapel Hill Environmental Chemistry; Copper kinetics in estuaries Later work: Calcium and magnesium binding to blood coagulation proteins Ph.D. – U. of Illinois; Oscillatory enzyme kinetics NMR Lab Director; see web page ( http://scs.illinois.edu/nmr/ ) 11 magnets‚ 350 users‚ 4 locations
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CHEMISTRY 1184 Laboratory Manual for GENERAL CHEMISTRY I Jim Carroll Roger Hoburg Dana Richter-Egger August 2006 University of Nebraska at Omaha i Table of Contents Table of Contents ......................................................................................................................................... i Chem1184 SYLLABUS............................................................................................................................... ii Preliminary
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stirring‚ but not water into the acid. 2）It’s not allowed to handle solid drugs with the hand directly. Don’t mix different kinds of chemicals arbitrarily. Basic operations in chemical experiment 1. Get knowledge of all kinds of common glassware‚ grasp the names and uses of them such as 1) Beaker. prepare solution‚ when heated‚ it must be puted on the asbestos gauze. 2) Erlenmeyer flask. heat samples or titration. when heated‚ must open the stopper. puted on the asbestos gauze. 3) Rounded(flat)-Bottom
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fresh parsley and spinach leaves? Scientific Concept Colorimeter measures the absorbance of light by the chemical substances at a certain wavelength. By measuring the absorbance‚ the concentration of a chemical substance can be determined. For the calibration of the colorimeter‚ different concentrations of a standard solution and a control (distilled water) are prepared in cuvettes. These cuvettes are put into the colorimeter one by one to calibrate it. After the colorimeter is calibrated‚ solutions
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