Beer’s Law Lab Hanna Beeter March 15‚ 2013 Honors Chemistry Introduction: In Beer’s law lab the purpose was to find the unknown concentration. The lab included the use of a volumetric flask‚ pipette‚ and spectrophotometer. The spectrophotometer played the biggest part in finding the concentration of the unknown. A spectrophotometer is an apparatus for measuring the intensity of light in a part of the spectrum‚ and is transmitted or emitted on a particular substance. After the number retrieved
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SPECTROPHOTOMETRY Spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength It involves with the use of a spectrophotometer. A spectrophotometer is a photometer that can measure intensity as a function of the light source wavelength. A spectrophotometer is commonly used for the measurement of transmittance or reflectance of solutions‚ transparent or opaque solids‚ such as polished glass‚ or gases. Principles
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tomb (TT277) from the 19th dynasty (c. 1293-1185 BC) (Fig. 1) which belongs to Amenemonet (the divine father of the temple of King Amenhotep III) at Qurnet Murai necropolis‚ western Luxor (about 670 km south of Cairo). Fig. 1. View of the wall decorations of the tomb of Amenemonet (TT 277)‚ Qurnet Murai necropolis‚ Luxor. 2.2. Visual observations Preliminary observations on the samples were per- formed using an Olympus SZ-40 stereomicroscope (10 and 20 objectives) equipped with an Olympus DP10 digital
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1. What club drugs? What are some of the factors that support the use of club drugs? They are just synthetic drugs that are typically used in bars‚ night clubs‚ raves and other gatherings. Some are popular in these places because they are thought to enhance or improve the experience‚ they also have no side effects or dangers. 2. What are screening tests? Why are they used? Screening test are test that help scientist identify several particular drugs that the substance is likely to be. They are
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Spectrophotometric Determination of Equilibrium Formal Report Matt DeLuca The Department of Chemistry‚ SUNY College at Brockport Brockport‚ NY 14420 CHM 206.04 Abstract: The main objective of this experiment was incorporating the use of spectrophotometry in an attempt to study the position of equilibrium. Furthermore‚ after the completion of this experiment‚ the formation of the equilibrium constant of the iron thiocyanate complex
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The majority of the experimentation in this project relied on the idea that there is a relationship between concentration and absorbance of a solution. This is easy to understand if you can visualize the particles in the solution; and this is especially true if the particles in solution portray a distinct color. The more particles there are in the solution‚ the more they will obstruct the path of the light. This occurs the most at the analytical wavelength‚ where the most light is absorbed by
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The Effect of Concentration on Absorbance Background Information The purpose of the “Determining Solution ‘Concentration’ Using A Spectrophotometer” lab was to use a spectrophotometer to find the relationship of concentration and absorbance obeying the Beer-Lambert law‚ which states concentration and absorbance are directly related‚ to then further determine the concentration of three unknown solutions. With the assumption that the solutions obey the Beer-Lambert law it is predicted that as concentration
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Diagram Of Cash Counter Basic components • A simple SD memory card Principle • IR Spectrometry » Infrared spectroscopy (IR spectroscopy) is the spectroscopy that deals with the infrared region of the electromagnetic spectrum‚ that is light with a longer wavelength and lower frequency than visible light. It covers a range of techniques‚ mostly based on absorption spectroscopy. As with all spectroscopic techniques‚ it can be used to identify and study chemicals. Principle Measurement
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Spectroscopy of Food Dyes Foods and drinks are identified by two major concepts: shape and color. When individuals want to buy fruit‚ shape and color help determine ripeness and the quantity. These qualities help people spend money efficiently by buying the best fruit‚ or any food for that matter. All foods have preconceived looks‚ and if a food were to not be the same color or a different shape‚ an abnormality is noticed. The Lab Manual provides information that there are nine different FDA approved
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Cited: 1. National Research Council. 1996. National Science Education Standards. Washington D.C.: National Academy Press. 2. John Vassallo (ed) 1995 Special issue on synchrotron infrared spectroscopy Synchrotron Radiation News 8. 3. R. L. Brunelle and Reed 1984 Forensic Examination of ink and Paper (Charles C. Thomas Pub Ltd‚ Springfield). 4. R. Saferstein (ed) 2001 Forensic Science Handbook (Volume 1) (Prentice Hall‚ New Jersey) 2nd edn
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