Acid-Base Extraction: Separation of an Organic Acid‚ Base and a Neural Compound Introduction/Background Acid base extraction is a widely used commercial method in separating acids‚ bases and neutral compounds. This is concept is based on several physical properties of the compounds‚ such as boiling point‚ melting points and solubility. The different solubility properties of the protonated and non-protonated forms of these compounds depend on the functional groups present‚ such
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Acid Rain Within this past century‚ acidity of the air and acid rain have become recognized as one of the leading threats to our planet’s environment. No longer limited by geographic boundaries‚ acid causing emissions are causing problems all over the world. Some laws have been passed which limit the amount of pollutants that are released into the air‚ but tougher legislation must be implemented before this problem can be overcome. Acid rain is produced‚ when automobiles‚ smelters‚ power
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Design: Investigation of Fermentation Introduction Introduction Yeast (Saccharomyces)is a single-celled microorganism in the Fungi family. It anaerobically respires sugars to produce ATP‚ as well as the waste products ethanol and carbon dioxide gas. This process is known as fermentation. There are various factors that affect the rate at which yeast respires. Aim To investigate the effect of concentration of table salt (sodium chloride) on the rate of fermentation of sucrose using yeast‚ measured
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Aqueous Acid/Base Chemistry Resources: Harris ‘Quantitative Chemical Analysis’ Review: Pure water has a pH = 7 Autodissociation: H2O (( H3O+ + OH- K = [H3O+][OH-]/[H2O] -log[H3O+] = 7 [H3O+] = 10-7 M = [OH-] [H2O] = 55.56 M K = 1.8 x 10-16 ; pKa = 15.74 pKa is the acid dissociation constant; low pKa (strong acid‚ high pKa (weak acid we can also write Kw = [H3O+][OH-] Kw = 10-14 In water‚ pH + pOH = 14 pH scale Strong
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Criminal Investigations In criminal investigations there are many aspects throughout the field that are very interesting. Some aspects are crime scene investigation‚ getting witnesses‚ taking and handling of evidence‚ investigative sources‚ legal aspects‚ interview and interrogating and case management. My favorite aspect of criminal investigating is taking and handing of the evidence and interviewing and interrogating. Today new and improved tools and techniques in the criminal investigation process
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visitors from injury caused by employees that the employer knows or should have known poses a risk to other (Woska‚ 2007). When conducting a reference or background investigation on an applicant‚ the most important and useful things to check for are criminal history‚ credit history‚ education history‚ and work history. A background investigation includes determining whether an applicant may be unqualified for a position and a reference check generally involves contacting applicants’ former employers‚ manager’s
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Without a good supply of carbohydrates as glycogen in the muscles and liver‚ and frequent supplies with food and drink‚ it reduces the amount of time that can be sustained a moderate or intense physical effort. Who takes part in events that last for over an hour must pay particular attention to supply meals and snacks rich in carbohydrates. Dehydration impairs performance and athletes should not lose more than 2% of body weight during
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wanting to go on a diet is that there are too many diets to choose from. There are two different main diets that people are always talking about. That is low-carb diets and low-fat diets. How do people know which diet is better? Low-carb diets are diets to where you eat low-carbs and high protein. Low-fat diets are just where you eat low fat or reduced fat. The Atkins diet plan‚ which is a low-carbohydrate diet‚ is a very popular diet. Many people have lost a lot of weight with this diet
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MATH INVESTIGATION 4.2 FACTORIZATIONS on the Math Investigator determines if a number is prime or composite. If a number is composite‚ it prints all its factors‚ the number of factors‚ and its prime factorization. The numbers 1‚ 2‚ 4‚ and 6 have 1‚ 2‚ 3‚ and 4 factors‚ respectively: 1 has only 1 as a factor; 2 has 1 and 2 as factors; 4 has 1‚ 2‚ and 4 as factors; and 6 has 1‚ 2‚ 3‚ and 6 as factors. These factors are illustrated by the rectangles shown here. Starting Points for Investigations
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Some reasons that a homicide investigation starts at the primary crime scene is mainly because the police are usually called to this location by the person who discovers the body‚ or‚ a witness to the crime‚ but it could also in some cases even be the victim. In homicide cases‚ the location where the body is discovered hold a great deal of physical evidence and serves as a starting point for the beginning of an official investigation. At this point it is safe to say that it is important to assume
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