EXPERIMENT 1 COLLIGATIVE PROPERTIES OF SOLUTIONS Date: December 03‚ 2013 Locker 21 Members: Vanessa Olga Dagondon Christine Anne Jomocan Janica Mae Laviste Nablo Ken Menez A. TYPES OF DISPERSED SYSTEMS Results and Discussion The first part of the experiment aims to differentiate the different dispersion systems. In this experment‚ three systems are introduced: true solution‚ colloidal dispersion and coarse mixture. The said three systems are classified through a property of colloids known as the
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United States thrives and prospers from the contributions of these different races and cultural groups; therefore they should be treated as a separate entity. This has been a topic of discussion since the 18th and 19th centuries. Since the phrase “melting pot” was introduced to describe the United States and the vast amount of different cultures and races. Many agreed and many disagreed. Both facts and opinions were abundant on both sides. In fact‚ Eduardo-Bonilla Silva stated “Blacks‚ Chinese‚ Puerto
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Casting Pattern » Mold » Pour » Cool » Remove » Inspect Types of Casting : Expendable Mold‚ Multiple Use Mold Sand Casting : Expendable Mold casting process uses sand as molding material Requirements • • • • • • Mold : single or multiple use Melting Process Pouring Technique Solidification Process Mold removal Clean‚ Finish‚ Inspection METAL CASTING PROCESSES Categories • Expendable mold processes - mold is sacrificed to remove part • Mold (Sand‚ Shell‚ Vacuum‚ Expanded Polystyrene‚ Investment
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What Interaction Of Outside Influence Makes Ice Melt Fastest? A. Explain the significance of the given factors in your project design plan: • Problem statement • Relevance of your testable question Problem Statement: I have lived in a place that during the winter‚ ice would form on the streets and sidewalks and have wondered why things such as salt or sand are used over other methods to help de-ice the surfaces? Why is salt or sand the most commonly used substances when addressing this issue
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Friedel-Crafts alkylation was performed by adding t-butyl alcohol to p-dimethoxybenzene in order to produce 1‚4-di-t-butyl-2‚5-dimethoxybenzene. This reaction yielded 0.009g of 1‚4-di-t-butyl-2‚5-dimethoxybenzene having a percent yield of 5%‚ and a melting point range of 54.8°C-56.9°C. Introduction This reaction is designed to put functional groups onto aromatic rings. This is done through an electrophilic aromatic substitution where a positive species is strong enough to pull electrons out of the ring
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Old Dominion University ORGANIC 214 Alkene Addition Submitted by: Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach‚ which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1‚2-diphenylethene)‚ two new chiral carbons are created from the sp2 carbons‚ therefore 3 different dibrominated stereoisomers are possible: meso-(1R‚2S)‚ or the raceminc mixture-(1R‚2R) or (1S‚2S)-dibromo-1‚2-diphenylethane
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fastest. How does salt melts ice? Salt melts ice by lowering the freezing point of the water around the ice. The ice melts and is unable to re-freeze except at a much lower temperature. Adding minerals‚ like salt‚ to ice can increase the rate of melting by disrupting the balance of the molecule. It is hard for salt to be absorbed by ice‚ but easy by water. Salt‚ on the other hand‚ combines with the ice (water) to produce a solution with a lower freezing point. This would melt the ice without sunlight
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out by Actual yield of synthesised aspirin: 0.347g 0.347/1.196 * 100= 29 Percentage yield: 29% Melting Points Compound Began Melting (°C) Totally Melted (°C) Range (°C) Pure Aspirin 136 1-2 Crude Aspirin 125 130 5 Product from Willow Bark 120 125 5 The documented melting point for pure aspirin is 136°C. An impure compound will exhibit a lower melting point than this‚ which is what was observed in both the willow bark product and the crude aspirin. Pure aspirin has
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metaphorically known as the ‘melting pot’‚ this implies the union of countless different cultures‚ ethnicities‚ religions‚ and backgrounds into America. They work in unison and everything runs smoothly between the people from different backgrounds because of America’s just government. This just government allows the people from all the varying cultures‚ ethnicities‚ and religions to have the freedom to do what they believe in‚ contrary to most other countries. Although the term ‘melting pot’ was not used to
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Mason Walsh Professor Dennis Kellogg ANT 100 A 14 October 2016 Cahokia: Book Critique In his book Cahokia: Ancient America’s Great City on the Mississippi‚ Pauketat gives insight into the 1‚000 year old midwestern city of Cahokia‚ and how it became such a big city in such an ancient time. Pauketat by setting the scene for how big cahokia really was. Most of the pyramids at Cahokia were within a five mile radius‚ which were designed in reference to the “four sacred directions and the upper and lower
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