Spectrophotometry/Beer’s Law Lecture Chemistry 114 Overview: Spectroscopy will be a tool that you will use as you continue in your chemistry‚ biology and physics courses. Already‚ you have used spectroscopy in this course and CHM 113. Earlier in the term‚ we used the spectrophotometer to monitor double stranded and single stranded DNA. We have also used it to measure concentration of chemicals. This lecture will discuss spectophotometry in more detail. Background: You will recall from
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HS1103- Engineering chemistry - I KINGS COLLEGE OF ENGINEERING Department of Science and Humanities Sub. Code: HS1103 Sem/Year: I / I Sub. Name: Engg.Chemistry-I UNIT – I – WATER TREATMENT PROCESS: PART – A ( 2 Marks) 1. Define hardness of water. 2. Distinguish between carbonate hardness and noncarbonate hardness. 3. Draw the structure of EDTA. What happens when EDTA is added to hard water? 4. Define alkalinity. 5. Why is water softened before using in boiler? 6. What is meant
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Vietnam War Research Paper: During the 30 years of XX century Vietnam was at war. It all started in the 1940′s‚ when the Communists fought against French colonial rule‚ and was completed in 1975 with the fall of Saigon. The period‚ which the Vietnamese know as the “American War” and the Americans call the “Vietnam War”‚ lasted from 1965 to 1973‚ during the time of the U.S. intervention. The communist leader Ho Chi Minh led his forces based in the north and defeated the French in 1954
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their unique optical‚ physical‚ electrical and medicinal properties. In this study‚ silver nanoparticles were synthesized by biophysical method. Silver nanoparticles were characterized using UV-Visible absorption spectroscopy (Surface Plasmon absorption at 418-420 nm)‚ Energy Dispersive Spectroscopy (EDX)‚ Scanning Electron Microscopy (SEM) and X- ray diffraction (XRD). The cytotoxic effect of silver nanoparticles on acute myeloid leukemia cell line (THP – 1 cell line) was studied in vitro. The
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Adlercreutz‚ H.‚ 1990. Western diet and Western diseases: some hormonal and biochemical mechanisms and associations. Scandinavian Journal of Clinical Laboratory Investigation‚ 50‚ 3S-23S. 2. Albert‚ K.‚ 1999. Liquid chromatography-nuclear resonance spectroscopy. Journal of Chromatography A‚ 856‚ 199-211. 3. Andersen‚ M.‚ and Markham‚ K.R.‚ 2006. Flavonoids: Chemistry‚ Biochemistry and Applications. Boca Raton: CRC Press‚ pg 20‚ 36‚ 84 and 104. 4. Anderson‚ J. W.‚ Johnstone‚ B.M.‚ and Cook-Newell‚ M
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Extraction and analysis of two compounds from unknown solution C ABSTRACT Liquid C and solid C were both extracted from unknown solution by first using chemically active liquid-liquid extract‚ followed by vacuum filtration. Liquid C and solid C were then purified with the use of simple distillation and recrystallization respectively. Through the process of recrystallization‚ the percentage purity of solid C was found to be 6.01%. The melting point range of purified solid C was 117.0 – 119
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synthesized using gallic acid in an aqueous chemical reduction method. The nanoparticles were characterized using transmission electron microscopy (TEM)‚ dynamic light scattering (DLS)‚ X-ray diffraction (XRD)‚ and ultraviolet–visible (UV–Vis) absorption spectroscopy; the antibacterial activity was assessed using the standard microdilution method‚ determining the minimum inhibitory concentration (MIC) according to the National Committee for Clinical Laboratory Standards. From the microscopies studies (TEM)
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Our data displayed supports the notion that by increasing the acidity of the catalyst‚ the production of aspirin will increase. Our hypothesis was proven correct. In our data‚ we calculated the percent yield and percent error of each trial. We also calculated the average of the percent yields and the percent errors of each catalyst. In the end‚ we saw that for the sulphuric acid catalyzed aspirin‚ we saw an average of 69.7% percent yield and an average 30.3% percent error. As for the phosphoric acid
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BY (2) ATOMIC ABSORPTION SPECTROSCOPY OF THE MIXTURE Experiment 4 Dates of Experiment: 10/14/08 through 10/30/08 Date of Report: 11/7/08 Chem 2262L � 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 mixture
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ust imagine drinking a nice cold Minute Maid Pink Lemonade on a hot day‚ or a cold Red Powerade after a long hard practice. The cold refreshing drink rushes through your body and quenches your thirst. However‚ do you know what you are actually drinking‚ and how much of that drink is contaminated with dye? In this experiment‚ with the use of a spectrophotometer‚ the amount of concentrated dye in three drinks will be tested. First‚ the dye itself will be examined to see what the optimal wavelength
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