Amino Acids Glycine is the smallest of the amino acids. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. In aqueous solution at or near neutral pH‚ glycine will exist predominantly as the zwitterion. Alanine is a hydrophobic molecule. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. The α carbon of alanine is optically active; in proteins‚ only the L-isomer is found. Serine differs from alanine in that one of the methylenic
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by everyday pollution from houses‚ factories‚ cars‚ and etc. This is the concept of acid rain‚ which according to EPA.gov is a broad term referring to a mixture of wet and dry deposition from the atmosphere containing higher than normal amounts of nitric and sulfuric acids. Acid rain isn’t just rain‚ its forms like hail or snow‚ which is wet deposition‚ and smoke or dust‚ which is dry deposition. The effects of acid rain are quite terrifying bringing all types of problems to the Earth‚ for example
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There are several ways to classify substances. One way is based on their pH. Substances may be * Acid 2. Base 3. Neutral INDICATORS This is a substance which is one color in and acid and another color in a base. Indicators can ten be used to test for the presence of acids or bases in a substance. Some are available in paper form (litmus) and others in liquid form (methyl orange). INDICATOR | COLOR IN ACID | COLOR IN BASE | LITMUS
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Preparing Esters by esterification method using carboxylic acid to an alcohol‚ which is 1.0 ml of ethanoic acid to the ethanol‚ and ethanoic acid to the propan-1-ol‚ also adding H2SO4 as a catalyst for the reaction Abstract: Esters are a group of organic compound‚ famous for their interesting odours and smells. In this investigation student used ethanoic acid and ethanol with sulfuric acid as catalyst to produce ester‚ which was known of its smell. However it was expected to have a pleasant smell
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Separation of Mixtures Mixtures exist in many forms in the world‚ and if it were not for methods of separation‚ many of these substances would be meaningless to us. Separating mixtures is extremely important to human lives; for example‚ many people filter water so that it is safe for drinking. Mixtures contain two or more substances that are not in a fixed ratio‚ and while some mixtures‚ such as concrete‚ are useful‚ others including salt water‚ are not as useful to us. Filtration‚ distillation
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Separation of the Components of a Mixture Purpose: To become familiar with the methods of separating substances from one another using decantation‚ extraction‚ and sublimation techniques. Apparatis and Chemicals: balance‚ Bunsen burner‚ rubber hose‚ tongs‚ 2 evaporating dishes‚ 2 watch glasses‚ 100-mL graduated cylinder‚ clay triangles‚ 2 ring stands‚ 2 iron rings‚ 2 glass stirring rods‚ unknown mixture of NaCl‚ NH4Cl‚ SiO2. Discussion: Mixtures are composed of two or more substances
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"Neutral Tones" by Thomas Hardy is very neutral in tone; its melancholic note is created by a narrator reflecting on the termination of a relationship. Throughout‚ a soothing yet depressing language illustrates this duality. Hardy uses a variety of techniques to highlight sadness and emotions in the narrator. In the first stanza the scene and atmosphere is set‚ "we stood by a pond that winter day".No harsh sounds are present and the sentence epitomises the tranquillity yet disheartening nature of
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Separation Techniques If one component of the mixture has magnetic properties‚ you can use a magnet to separate the mixture. Cobalt‚ iron and nickel all have magnetic properties. Note that not all metals are magnetic and magnetism is not a method to separate metals from non-metals. Gold‚ silver and mercury are examples of non-metal substances. Magnetism is however a way to separate magnetic substances from non-magnetic substances is. Magnetism as a separation method is done by taking any magnetic
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Should Toys Be More Gender-Neutral? This topic is one that does hit me close to home because I have a ten year old sister and a few other cousins younger than her. Though I did not really think about this topic much until now. It is the twenty-first century after all‚ shouldn’t gender-neutral toys be a thing? With this I researched this topic more with this help of my sister to learn more about. Though sadly I do believe that toys should be more gender-neutral even though they currently aren’t.
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Acid Base Titration bre’ana March 1‚ 2013 Purpose: The purpose of this experiment is to determine the concentration of a solution of NaOH by titration with a standard solution of HCl. It was also the purpose to determine the concentration of a sample of white vinegar by titration with a standard solution of NaOH. Introduction: Using the method of titration is how the experiment gets to the conclusion of the concentration of a solution. When doing this experiment‚ measurement is very important
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