"Find the concentration from absorbance" Essays and Research Papers

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    Solutions and Their Concentrations 1. Molar Concentration or Molarity – Number of moles of solute in one Liter of solution or millimoles solute per milliliter of solution. 2. Analytical Molarity – Total number of moles of a solute‚ regardless of chemical state‚ in one liter of solution. It specifies a recipe for solution preparation. 3. Equilibrium Molarity – (Species Molarity) – The molar concentration of a particular species in a solution at equilibrium. 4. Percent Concentration a. weight

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    QUANTITATIVE DETERMINATION OF COPPER (II) CONCENTRATION BY SPECTROPHOTOMETRY D.DEL PRADO1‚ J. BELANO1‚ M.MAHUSAY2‚and M.FRANCISCO2 1 DEPARTMENT OF FOOD SCIENCE AND NUTRITION‚ COLLEGE OF HOME ECONOMICS 2INSTITUTE OF CHEMISTRY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHLIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: 12 MARCH 2013 DATE PERFORMED: 7 MARCH 2013 ------------------------------------------------- ------------------------------------------------- ABSTRACT -------------------------------------------------

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    Auschwitz Concentration Camp Imagine that you were a 14 year old Jewish girl riding with your family and hundreds of other Jews and Gypsies packed into one tiny railroad car. You stop at an unfamiliar place were a man is screaming at you to get out. You have to watch your step getting out of the railcar because there are already dead people on the floor who passed on the trip here. Once you are out you are separated from your family‚ woman on one side men on the other. Kids are franticly

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    Today‚ is my second day in concentration camp #59‚ which goes by the name Sobibor; an extermination camp. (Which is just one type of many different purposed camps‚ including prisons‚ labor‚ and transit camps.) I arrived here yesterday at roughly a quarter to noon‚ with my sickly mother Aliza and two older brothers Adam (17) and David (21). My father was brutally murdered yesterday by one of the many Nazi soldiers who invaded our home. “Eliana‚ sis‚ wake up. Protocol will begin in five minutes

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    The great tragedy of what we know as World War two brought great danger to lots of people‚ but to not forget of what people themselves feared most‚ concentration camps. To be more specific in this case‚ the Auschwitz camps. In its time‚ it was the most effective camp of the Nazi regime. In this place‚ it consisted of three camps‚ each with their very own deadly purposes. The reasons this camp over all was the most effective was‚ history of its building‚ the day of a prisoner in the camps as well

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    The concentration of wealth is why Western Europe never fully enveloped Marxism. In the East‚ Africa‚ and South America‚ they had wealth concentrated in the hands of a very few high classes‚ whereas in Western Europe and North America it was somewhat more spread out. In the "poor" areas‚ Marxism was seen as a way to take wealth from the elites and spread it among all the people‚ and Marxism was in most cases with the overthrow and execution of the elites. In the areas where

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    performed. By using 2-hydroxy-3‚5-dinitrobenzoic acid to oxidize the aldehyde group on the carbohydrate‚ the reducing end of glucose increases in absorbance of 540 nm. Using a UV spectrophotometer‚ the concentration was calculated by using a regression line of the standard curve. The experimental data concluded a 1068.912 µg/ml. With the actual concentration being 1200.000 µg/ml‚ a 10.924% error was deduced. Though the error is slightly high‚ the deviation of 134.370 µg/ml makes up for some of the

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    its absorbance in differently concentrated solutions. A spetrophotometer was used to measure the absorbance of the enzyme catecholase in different pH solutions as well as to measure the absorbance of catecholase in solutions with different concentrations of potato juice and phosphate buffers. Absorbance of the enzyme catecholase was at an optimum level when pH was close to neutral. When pH was acidic or basic‚ the catecholase was less effective. Also‚ when there was a higher concentration of potato

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    In conclusion‚ the concentrations and absorbance of the Kool-Aid solution were found. The purpose of the experiment was to develop a deeper understanding of the effect that concentration has on the absorbance of light–which the objective was met. To add‚ another goal of the experiment was to determine the unknown solution’s concentration using the absorbance data recorded. This was concluded to be 0.25 M–most similar to Solution #1. Concentration‚ measured in molarity (M)‚ can be calculated using

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    Auschwitz was a concentration camp established in 1940 by the Nazis. The Nazis sent the Jews and other "undesirable" people here to be used as slaves or to be killed. It was located in Oswiecim‚ Poland. There was no privacy when the captives had to go to the washroom. Buckets and toilets were lined up in rows‚ and the toilets were often broken and flooded with urine and feces. Although the prisoners were exhausted due to hard work‚ sleeping was difficult because the bunks were made out of wood. The

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