BASIC CHEMISTRY (UDBB 1114) BACHELOR OF SCIENCE (BIOTECHNOLOGY) SESSION : MAY 2013 DATE : 25 JUNE 2013 LECTERUR : EXPERIMENT 4 DETERMINING MOLECULE WEIGHT BY FREEZING POINT DEPRESSION METHOD STUDENT NAME : ID : LAB PARTNERS | | INTRODUCTION According to Anne‚ n.d‚ the freezing point of a liquid is decreased by adding to another compound to it. This is known as freezing point depression. The pure solvent will have higher freezing point than the solution. Colligative property of
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Background The melting point of a compound is the temperature at which the solid is in equilibrium with its liquid. A solid compounds changes to a liquid when the molecules acquire enough energy to overcome the forces holding them together. A mixture melting point is useful in confirming and used to indentify an unknown compound‚ which we will be doing in this particular experiment. Purpose Measure the melting points of pure benzoic acid and pure mandelic acid. Determine the eutectic composition
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Melting Points Elizabeth McGrail Organic Chemistry I 25 January 2013 ABSTRACT The objectives of this lab are‚ as follows; to understand what occurs at the molecular level when a substance melts; to understand the primary purpose of melting point data; to demonstrate the technique for obtaining the melting point of an organic substance; and to explain the effect of impurities on the melting point of a substance. Through the experimentation of three substances‚ tetracosane‚ 1-tetradecanol and
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Abstract: A qualitative analysis experiment was conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test‚ a Schiff test‚ an iodoform test‚ and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone‚ Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine the identity
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generally high melting points‚ are loose and flexible with their electrons‚ conduct electricity well‚ and have low solubility in water. Ionic compounds are generally crystals‚ have a high melting point‚ and usually have high solubility in water and conduct electricity well when dissolved in water. Covalent compounds have individual molecules‚ have a low melting point‚ and do not conduct electricity‚ and their solubility in water depends on the type of covalent bond. In the melting point test
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is because the first structure is a trans isomer and the second structure is a cis isomer. Trans isomers have a higher melting point than cis isomers. b) No we won’t be able to tell the difference between the two isomers. This is because they are enantiomers. Enantiomers have the same melting point. 8. Increased intermolecular hydrogen bonding does increase the melting point. It causes the boiling point to be elevated since the molecules are more attracted to each other and thus require
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Abstract This paper will explore my philosophy of diversity. Since I live in the United States‚ the paper will focus on the United States’ diversity. In the course‚ ORG6499: Cultural Diversity & Individual Differences we have done multiple discussion journal reflections which relate to diversity. The paper will relate those discussions to my philosophy of diversity. A few of those discussions focused on the United States diversity and it appears that America’s diversity would be pluralistic and
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Glance Watch operates its company including three domestic markets in the Merica region‚ and one foreign market in Pandau. The company runs business based on consumer interaction and product development research such as economic‚ political‚ social environment‚ life style and technology innovation. In Merica‚ there are no limits imposed on monetary exchange or the entry of foreign funds into the country. The government encourages incentives to attract investors to their area such as tax break‚ direct
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Rodriguez’s “The Chinese in All of Us” is about multiculturalism and bilingual education in America‚ which impacts our individual identity. He claims that it is our surroundings that define who we are‚ culturally‚ and because of the fact that America is a melting pot of many cultures‚ it is difficult to define who we are. To support his argument‚ the author uses pathos in the form of his personal experiences. Fallacies are present in the article but it is committed by others and supports his claim. In establishing
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is expected to compete with traditional petroleum-produced polymers. The production of Polyhydroxybutyrate is well known in the medical field as it is mainly used for surgical pins and internal suture due to its biocompatibility. It has a high melting point with about 175C‚ which makes the material compatible as containers with high temperature usage. These properties of being biodegradable meaning its products decompose naturally without surgery needed to remove‚ and biocompatible meaning the
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