CHEM 2303: ANALYTICAL CHEMISTRY II LECTURE 1 – INTRODUCTION‚ SAMPLE PREPARATION AND SPECTROPHOTOMETRY WHY STUDY ANALYTICAL CHEMISTRY? To gain a knowledge of the methods and strategies that have been developed to investigate the nature of the chemistry around and within us. To answer the age old questions: What is it? What is it made of? How does it work? We must learn the principles of chemical analysis and the array of strategies that have been developed to analyze chemistry. HOW DO WE ANALYZE
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and Spectrophotometry ABSTRACT: This was an investigation into the effects of different wavelengths of light on methylene blue and carmine red on the absorbance value on a spectrophotometer. A spectrophotometer is used to measure light intensity by emitting a single light source through a cuvette of coloured solution. The particles in the solution‚ which are coloured‚ absorb the light depending on how concentrated it is and this produces an electronic reading from the photometer which is the
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1. Define land resource surveying methodology. Identify the two approaches in land resource surveying methodology. 2. Discuss the contributions of Aristotle‚ Louise Deguerre‚ Argo‚ Loussedat and Deville in enriching the science of topographic surveying. 3. The atmosphere influences EMR in two ways. Discuss them. 1. According to Professor Masaka (2011) Land resource survey methodology can be defined as the starting point for any natural resource management policy has to be an inventory of
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In the City of Ember‚ the setting is dark and gloomy. The author‚ Jeanne DuPrau‚ reveals that the city is very broken and is in a destitute condition as many blackouts occurred in the city. For instance‚ Doon points out‚ “Running out of light bulbs‚ running out of power‚ running out of time—disaster was right around the corner” (48). The status of Ember is poor due to the lack of resources. As this dark situation threatens to overtake the city‚ Doon steps forward to join the pipeworkers‚ while he
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to stop jim’s thought-> radio‚ tv show‚ poster(X Fiji)‚ more and more danger-> Fire‚ leak at the nuclear plant(silver man) ‚ Lighting normal : realistic and general->TV monitor and lights‚ in-house lighting‚ no special effect vs inside the show: dramatic and intensive source generally key light- eg. talking with fd on bright ‚ BUT- audience
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CASE STUDY PEARL CONTINENTAL BY: MEHWISH MUMTAZ MFA I-D 2nd SEMISTER WHAT IS CASE STUDY? Case studies : • are written summaries or syntheses of real-life cases based upon data and research • require you to isolate and think through the key issues involved against both theory and the larger comparative environment • identify appropriate strategies for the resolution of the ’case’ • weigh the pros and cons of the remedial options/strategies
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photo the objects and the dark areas‚ I can see that is still can visible. I refer this to two techniques; the first one is the light condition. In this photo the photographer used only the nature light as only light in his photograph. Also the second technique is the photographer used is chemicals to make different between dark areas and light areas. As before I talk about light‚ if we trying to explain the time that this photograph have been taken in is probable is at afternoon because is only time
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atmosphere‚ almost making the viewer feel as if they are trapped in the room with the two characters. In this scene‚ Weine additionally intended to paint the floor and parts of the wall of the setting in high-hued tone to distinguish the accentuated light from the normal one on which the main character may stand in scene. He did so to keep the audience fascinated as well as making them concentrate on the highlighted position. In years to come‚ distinctive sorts of German Expressionist settings were
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A high intensity lamp is spiraled around the cylinder to produce a flash of light that triggers the laser. The ruby laser wavelength is 649.3 nm with a deep red color. How A Ruby Laser Works: 1. High-voltage electricity causes the quartz flash tube to emit an intense burst of light‚ exciting some of the atoms in the ruby crystal to higher energy levels. 2. At a specific energy level‚ some atoms emit particles of light called photons. At first the photons are emitted in all directions. Photons
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(in this case Bromophenol Blue and Methyl Orange) at varying wavelengths of light. For Experiment 2‚ the process of the experiment focuses on the substance and records its absorption levels at different concentrations. The absorption levels (A) that are obtained when samples of any given substance exposed to a source of visible light are measured by: The length (l) of the light path (i.e. the distance over which the light had to travel)‚ and the concentration (c) of that substance. This‚ essentially
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