Wang Experiment #4 Recrystallization of Pure Phthalic Acid‚ Benzoic Acid and Napthalene Introduction Recrystallization is a important method in purifying organic compounds which are solid. It is an effective method that is important to be familiar with that is essential in the industrial chemical world. This experiment will allow students to be familiarized with the technique of recrystallization by working with phtalic acid‚ benzoic acid and naphthalene from appropriate organic solvents. Experimental
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activity at Alpha Fundamental‚ factors explaining the high-energy of the after-school students includes: coming out of seven hours of educational institute (which may or may not involves exercise): a brief break at lunch time and another break for traveling two blocks to Alpha Fundamental: and finally a moment to eat snack before starting homework. At the same time you can say‚ the after school students are given more than enough time to adapt and adjust to the limits and rules of Alpha Fundamental
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To be part of Lambda Theta Alpha would mean sisterhood‚ unity‚ love and respect‚ and a chance to be part of a great organization to build leadership that will also provide political‚ social‚ and cultural activities and possibilities. It will be a great opportunity to build my character with those qualities and help others to do so as well to be a united and empowered young group of women. I would be extremely grateful to be a part of this organization to help our community. To volunteer with sisters
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brightest stars (11th as viewed from Earth). Hadar is a blue-white super giant in the constellation Centaurus (Cen). In about 4‚000 years‚ the motion of Alpha Centauri‚ who’s proper name is Rigel Kentaurus‚ will carry it close enough to Hadar that they will appear to be a magnificent double star. Because of the distance away from Earth that Alpha and Beta Centauri are (approximately 90 parsecs)‚ they will be an optical double. As they sit today‚ the two stars look like a pair of eyes‚ the right one
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BEHAVIOUR OF AMINO ACIDS IN SOLUTION Abstract In this practical the acid-base behaviour of amino acids was assessed. Amino acids are amphoteric. They have the basic (amine) and the acidic (carboxylic) functional groups. These show the same type of equilibrium reactions that all weak acids and bases undergo‚ and the relative amount of each can be altered by adjusting the pH of the solution. For this practical glycine was used as a model to show this unique nature of amino acids. A series of
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The Alpha Position: Every domesticated dog needs to be trained in this area. By no means should your dog be allowed to assume this role in your home or outdoors for that matter. Dogs do not speak‚ they bark‚ except for the Basenji breed of course‚ so do not assume dogs understand human language. Ultimately your dog needs to know that you are in charge and as such‚ your dog can relax‚ knowing that you will protect him. I know this sounds strange‚ as many of us assume the dog is there to protect us
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The Web Search market has been dominated by Google‚ forcing Microsoft and Yahoo to form an alliance in July 2009 to get a larger slice of the huge web search pie. The new Wolfram/Alpha Search engine‚ however‚ tries to compete with Google and other similar search engines by “researching” rather than just “searching” data. Stephen Wolfram‚ the new search engine creator gives an example; for a question like "How many Nobel Prize winners were born under a full moon?" Google would find the answer only
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Ethanoic Acid Advantages: Ethanoic acid is non-toxic and is a weak acid‚ meaning it will not do any damage to most surfaces as it does not corrode or bind to other metals‚ therefore can be easily removed through washing or rinsing it. Disadvantages: Ethanoic Acid is the slowest de-scaler of the three acids‚ and is therefore the least effective. It also may cause an unpleasant smell‚ and can have a negative effect on the taste of coffee meaning one would need to spend longer time rinsing and cleaning
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steps of the citric acid cycle. Differentiate between citric acid cycle and glyoxylate cycle. Relate citric acid cycle as energy source. The Central Role of the Citric Acid Cycle 3 processes play central roles in aerobic metabolism. The citric acid cycle. Electron transport . Oxidative phosphorylation. Metabolism consists of: Catabolism: the oxidative breakdown of nutrients. Anabolism: the reductive synthesis of biomolecules. • The citric acid cycle is amphibolic
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AMINO ACIDS BY MEANS OF TITRATION CURVE ABSTRACT The aim of the experiment was to identify an unknown amino acid through acid-base titrations which was prepared in water to form an acidic solution. Each group prepared unknown amino acid hydrochloride. The pre-prepared basic solution was slowly added to the amino acid solution and pH change was closely observed using the pH meter. During these titrations the amino acid converted from cation to zwitterion to anion; zwitterion is an amino acid with
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