Chem 234 02/17/13 Lab 2: Melting Points Purpose: To determine the purity of a substance using melting point as physical property. We must also learn how to identify an unknown compound using its melting point. We got to identify an unknown compound using mixture melting point and finally we must learn to obtain an accurate melting point using Mel-Temp apparatus. Procedure: Set voltage to obtain the desired heating rate at the anticipated melting point range. The voltage control controls
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Melting Point Determination Identity and Purity of Solid Organic Compounds Objectives • To introduce the technique of melting point determination. • To use the concept of melting points for identification and characterization of organic compounds. • Properly fill and use a capillary melting point tube. • Determine accurate melting point ranges for a wide variety of organic substances. Introduction The melting point of a solid can easily and accurately be determined
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Point Of View December 4‚ 2011 E block The three points of view are first person‚ third person limited‚ and third person omniscient. First person is when the narrator is a character in the story. Third limited is telling from one characters perspective‚ and omniscient is an all seeing‚ all knowing narrator. Situational irony is defined as a contradiction between what is expected to happen and what actually happens. Narrator point of view creates situational irony
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_______________________________________________________________ 1. (2 points) False: Effective managers are always true leaders. 2. (4 points) Upper management at Tupelo Foods determined that there would be no end-of-year bonuses due to declining sales. Sherry‚ a department manager‚ let her staff know that even those high-performing employees would not get bonuses this year. This change limited what type of power for Sherry? A. Legitimate B. Reward C. Coercive D. Referent E. Expert 3. (4 points) Which of the following traits
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COLLIGATIVE PROPERTIES: FREEZING POINT DEPRESSION AND BOILING POINT ELEVATION DAY 1 – 04 FEBRUARY 2015 Colligative Properties Depends on the NUMBER of solute‚ not on the nature of solute particles Freezing Point Depression Boiling Point Elevation Vapor Pressure Lowering Osmotic Pressure Electrolyte and Nonelectrolytes Electrolytes •Separates in water forming a solution that conducts electric current •IONIC COMPOUNDS Non- electrolytes • does not allow the flow of an electric current • COVALENT
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“The Tipping Point: How Little Things Can Make a Big Difference.” By Malcolm Gladwell. Malcolm Gladwell‚ the author of The Tipping Point‚ explores the phenomenon known as the tipping point. According to Gladwell the tipping point is the moment at which "an idea‚ trend‚ or social behavior crosses a threshold‚ tips‚ and spreads like wildfire". In other words‚ the point when an idea‚ trend‚ or behavior becomes an sensation to the world. Gladwell researches the behaviors of fashion
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"Lady Macbeth fears her husband’s human nature‚ as well as her own female nature‚ and therefore she fears the light of reason and the common daylight world" -Fergusson‚ Francis. "Macbeth as the Imitation of an Action." Shakespeare: The Tragedies. A Collectiion of Critical Essays. Alfred Harbage‚ ed. Englewwod Cliffs‚ NJ: Prentice-Hall‚ Inc.‚ 1964. [Macbeth] announces the King’s approach; and she‚ insensible it should seem to all the perils which he has encountered in battle‚ and to all the happiness
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The phrase “turning point” has a lot of meanings but personally‚ for me‚ it is a moment that caused me to realize what has always been in front of me. Turning point may also mean a time at which a decisive change in a situation occurs‚ especially one with beneficial results. Recently‚ one event became the turning point of my life and my beliefs. Last Tuesday‚ our class‚ II-St. Therese watched the film “The Encounter”. That movie marked a pivotal moment in my life. It helped me realize that Jesus
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Introduction The melting point is defined as the temperature at which the solid is in equilibrium with its liquid‚ and this characteristic is very unique‚ so a substance can be determined by the melting point. Determination of the melting point is very important technique in many areas of chemistry especially‚ in organic chemistry area because the melting point is really significant in order to identify the purity and the identity of a substance. Measuring the melting point is a fast and cost-effective
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As young men born in the same year (1955)‚ they set out from the same starting point‚ but with radically different personalities. In the early days of personal computers‚ both dropped out of college and launched their own businesses. Of the two‚ the late Steve Jobs was always the quick‚ live-for-the-moment hare‚ while Bill Gates was the dispassionate‚ lawyerly‚ bide-your-time tortoise. For two decades‚ the race between the two went according to script‚ with the hare jumping out to a huge early
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