April Goodson CHEM 242L-002 February 20‚ 2013 Oxidation of Cyclohexanone to Adipic Acid Abstract The cyclic ketone cyclohexanone was oxidized to adipic acid using the oxidizing agent nitric acid. The experiment yielded 0.2667 grams of adipic acid‚ giving a percent yield of 113.97%. Although the product was allowed to dry for one week‚ residual moisture was still present in the sample and a melting point could not be obtained. This error in the experiment either resulted from adding too much
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with the standard 0.050 M sulphuric acid provided‚ using phenol red indicator until two or three consistent results are obtained. d. Calculate the weight of acetylsalicylic acid in each tablet and compare your results with the manufacturer’s specification. Compare your results with those given in different brands of aspirin. Titration Results Titration trial 1 2 3 Final burette reading (cm3) Initial burette reading (cm3) Volume of acid used (cm3) Average volume
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Conjugated linoleic acid‚ is a form of linoleic acid‚ an omega-6 fatty acid important to human health (Wang and Jones‚ 2004). The CLA is formed by the bacteria in rumen of certain ruminants but not for humans. It is obtained by humans from dietary sources such as beef‚ lamb and dairy products including milk and cheese (Wang and Jones‚ 2004). CLA is an antioxidant‚ anti-carcinogenic‚ anti-diabetogenic‚ anti-atherosclerotic‚ anti-catabolite as well as an immune system enhancer (Belury‚ 2002). Health
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Simple Equilibria 1. Identify the acid/base and their conjugate base/acid‚ and which definition you use to determine(Bronsted‚ Arrhenius or Lewis): a. HCO3- + H+ ↔ H2CO3 Base conj acid: Bronsted b. HCO3- ↔ CO32- + H+ Acid conj base : Arrhenius c. CH3NH2 + H2O ↔ CH3NH3+ + OHBase acid conj acid conj base : Lewis d. C6H5OH + H2O ↔ C6H5O- + H3O+ Acid base conj base conj acid : Lewis‚ Arrhenius‚ Bronsted e. H2O + H2O ↔ H3O + + OHAcid base conj acid conj base - 2. Assuming Kw = 1x10-14
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of acetylsalicylic acid Results and Data treatment (A) Preparation of aspirin i) Details about the reactants Reaction of the acetylation of salicylic acid is following From the balanced reaction above‚ it can be seen that the stoichiometry between salicylic acid and acetic anhydride is 1: 1. In this experiment‚ 21.7mmol of salicylic acid was used to react 6.0mL of acetic anhydride and salicylic acid was limiting reagent. The expected amount of salicylic acid used: 21.7/1000*138
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To detect an acid‚ the scientists use indicators. Litmus is one indicator. An acid turns blue‚ litmus red. Acids are a group of chemicals with very similar properties. An acid is a sour-tasting substance. Lemons taste sour because they contain citric acid. The sour milk contains lactic acid while the sour taste of vinegar is due to acetic acid. Acetic acid‚ which is an ingredient of vinegar‚ releases only a limited number of ions and is not a strong acid. All these are weak acids. This is the reason
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Experiment 1: Purification of Benzoic Acid by Recrystallization III. Introduction Purification - physical separation of impurities and by-products from an impure sample pure substance. *Distillation- for liquid compounds‚ *Recrystallization- solid compounds Recrystallization - precipitation of a solid cpd. from a saturated solution in the form of crystals through cooling or evaporation -7 steps: 1) selecting the appropriate solvent 2) dissolving the solute 3) decolorizing the
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Acid Rain Research Paper What is acid rain? Rain is one of the most dire and essential needs for a thriving ecosystem‚ and to sustain human‚ animal‚ and plant life. The water provided by the water cycle‚ the event causing rain‚ is required to keep all life on Earth alive. Rain‚ although naturally acidic‚ seems to have been increasing at a rapid rate due to many reasons. Some of these many reasons include‚ pollution. Pollution from homes‚ factories‚ power stations‚ cars‚ and many more
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Acid rain is a rain or any other form of precipitation that is unusually acidic‚ i.e. elevated levels of hydrogen ions (low pH). It can have harmful effects on plants‚ aquatic animals‚ and infrastructure through the process of wet deposition. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive
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patel (rmp932) – Post-Lab 5 Acid/Base Titration – lyon – (51730) This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Answer the question to at least six significant figures. A solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP‚ formula weight 204.2 g/mol). From the following data‚ calculate the molarity of the NaOH solution: mass of KHP 1.404 g; buret reading
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