and Purification of Solids Melting Points CH-337 Abstract: The purpose of this experiment was to find the eutectic point for the mixture of naphthalene and biphenyl. This was done by measuring the melting point of both pure substances and five mixtures of different ratios. The purpose of the second section was to identify an unknown sample by measuring its melting point and mixing it with two known substances and comparing them. The results suggest that the eutectic point is closest to the weight
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#1: THE PURITY AND PURIFICATION OF SOLIDS MELTING POINTS ABSTRACT Melting points of different mixtures of naphthalene and biphenyl were examined in this lab. Samples of these various mixtures were collected and tested by different individuals in the lab in order to find the eutectic point of biphenyl. Unknown substances were then tested using the mixture melting point method in order to determine their identities. INTRODUCTION The melting point of a solid is the temperature where the
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VI: Conclusion: The melting point of a compound is the temperature at which the solid is in equilibrium with its liquid. A solid compound changes to a liquid when the molecules acquire enough energy to overcome intermolecular forces holding them together in an crystalline lattice structure. The melting point range is defined as the span of temperature from the point at which the crystals first begin to liquefy to the point at which the entire sample is liquid. This data can be tabulated experimentally
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collection jar was weighed and recorded. In the first recrystallization‚ 1.0 gram of adipic acid without the use of decoloring charcoal was recrystallized. After securing the yielded sample in one of the weighed jars‚ the next recrystallization was performed. As previously done‚ 1.0 gram of adipic acid was recrystallized. However‚ .10 gram of the pelltized decoloring charcoal was added to the sample. The yielded adipic acid was also collected in one of the weighed jars Both samples were left without caps
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Theory Analysis Paper Instructions & Rubric (20%) Your paper is to be presented in APA 6th Edition scholarly format using the required headings shown below and should be no longer then 7-10 pages. All papers must be submitted to the correct DropBox in eCompanion. Be sure to follow the rubric below and include all the required information‚ in APA 6th Edition format with references. See syllabus for PPT or YouTube presentation about your theorist (10%). Requirements 100 points (20%) A. Theory/Author
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The melting pot is a theory in which came about in the Revolutionary period by Michel-Guillaume Jean de Crevecoeur. His theory envisioned that America was a “melting pot”‚ where individuals of all nations are melted together to become a new race of men. The term melting pot refers to the idea that societies formed by immigrants of different cultures‚ religions‚ and ethnic groups‚ will produce new hybrid social and cultural forms. The notion comes from the pot in which metals are melted at great
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be the melting pot of the free‚ where people from far and wide can come to enjoy a life of ease. As what Jimmy Carter says “We become not a melting pot but a beautiful mosaic. Different people‚ different beliefs‚ different yearnings‚ different hopes‚ different dream”. Although it may seem nice to have a true melting pot society‚ times have drastically changed since this theory was coined together in the 1780’s. America still has a long way to go until it achieves the long sought for theory. In the
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Experiment 11 Title: Spectrophotometric analysis of caffeine and benzoic acid in soft drink. Name: Tan Herh Lim Name of partner: Sia Ting Wai‚ Chong Zheng Yee Date: Lecturer: Dr. Neo Kian Eang Practical class: P1 Objective: To obtain the absorbance of the caffeine and benzoic acid in soft drinks. Introduction Soft drinks that commonly found in our daily life contain caffeine and sodium benzoate. The caffeine act as a stimulant and the sodium benzoate acts as a preservative
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is done by observing the melting point. This is important because if there is an impure substance the melting point would be depression and the melting range would be broader. By finding the melting point of a known substance one can then observe an unknown substance’s melting point to see if the points are the same and try to figure out the unknown. Experimental Section: The first known substance we used was Biphenyl. 68 degrees Celsius is the known melting point. We used the capillary method
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The Melting Pot Is The United States of America the “melting pot” of the world? A melting pot is “a place where races‚ theories‚ etc.‚ are mixed.” (The Oxford Dictionary) Many immigrants come to the United States for the same basic reason: A better way of life. These same immigrants envision their dreams of success‚ freedom and happiness coming true. Without different cultures coming together learning from one another‚ many of today’s modern marvels would not exist. A good example of this is
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