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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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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The experimental melting point range of the desired alkene product‚ trans-9-(2-phenylethenyl) anthracene‚ was found to be 132-134 ˚C‚ in comparison to the literature value melting point range of 130-132˚C‚1 it was slightly higher than expected. Overall‚ the experimental melting point range varied from the initial melting point temperature and maximum melting point temperature by 2˚C. As the experimental melting point had a small range of temperature variance and was above that of the literature value
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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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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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spectrum in KBr was a great way to compare the library spectrum to the crude and recrystallized Phenacetin. The KBr is a compound that does not show up in the spectrum‚ only the crude and recrystallized Phenacetin show. In this experiment‚ the crude had an 87.17% match to the library. In the recrystallized Phenacetin‚ the IR spectrum was taken twice due to the amount of KBr used in the pellet. The first recrystallized spectrum had a 68% match to the library spectrum. That not being that good
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