1.) How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? The way the fluted filter paper is folded hastens filtration because it increases the surface area of the filter paper‚ giving the solution more area to go through. A piece of wire is placed to avoid build-up of pressure‚ and easily pour the solution without spilling. 2.) Enumerate 2 techniques that can help
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Lab # 4 Crystallization Jonathan Odell Partners: Allyson Chiu Michelle Jung Regine Ong Day 1 Period 3 Experiment conducted: November 15‚ 2012 Submitted date: November 21‚ 2012 Introduction: In this lab‚ the students were separated into groups of four in which were given a test tube that was half full of hydrate sodium thiosulfate. The experiment’s purpose was to observe the reaction of the hydrate sodium thiosulfate in different situations‚ such as being shook over a period of time
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was clearly explained by Zook et al. [2] by observing that cold cast Nafion films have a micellar configuration with the sulfonic acid groups on the outside and tetraflouroethylene backbone inside of the micelle; by the heat treatment‚ the micelle structure was changed into an inverted micelle with the sulfonates on the interior. the curing procedure may seal pinholes or cracks present in the Nafion membrane‚ in addition to increasing crystallinity of Nafion http://www.eng-tips.com/faqs.cfm?fid=957
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compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool‚ the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration. (orgchem.colorado.edu) A desirable solvent for crystallization has the following properties: 1) dissolves the solute readily at an elevated
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A PAPER ON “SMART MATERIALS:A NEW TREND IN TECHNOLOGY” PRESENTED BY‚ SAHIL G. GOVINDWAR. govindwar.sahil@gmail.com Contact No: 7709575108. BABASAHEB NAIK COLLEGE OF ENGINEERING‚ CIVIL ENGINEERING DEPARTMENT. PUSAD. . CONTENTS . Sr. No. | Title | Page No. | 1 | Abstract | 1 | 2 | Introduction | 1 | 3 | Classification | 2 | 4 | Advantages and Disadvantages |
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Marriott Corporation Evaluating the cost of capital 1. What is the weighted average cost of capital for Marriott Corporation? 1 (a) What risk-free rate and risk premium did you use to calculate the cost of equity? R (f)‚ or risk free rate used for calculating cost of equity was the Geometric Mean (GM) for LT US govt. bond returns (Exhibit 4). We used the overall GM of 1926-1987 of 4.27%. This is because this is the period that Marriott has been in operation and would be a good reflection
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on your direction with help of an arrow and make your Miller indices consistent with that direction. 12 3 First three peaks in a powder x-ray diffraction pattern from a cubic crystal appears at Bragg angle =13.63‚ 22.63 and 26.82 when CuK radiation with a wavelength of 1.54 Å is used. Determine the structure and lattice parameter of the material. 12 4 Iron changes from a low temperature BCC phase to a high temperature FCC phase upon heating above 910C. Determine the % increase or
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DATA AND RESULTS Substances Treatment Observation Rapid cooling Slow cooling Benzoic acid + NaCl + congo red Heat and filter Colorless solution‚ Coarse crystals Colorless solution‚ Fine crystal Crystallization is a highly effective method for the purification of organic substances‚ provided that the physical properties of a given compound permits its purification in this manner. Solid organic compounds when isolated from organic mixtures or reactions are seldom pure; they are usually contaminated
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Lab Report 3: Electrical Properties of Ceramic Materials Lab III: Physical Properties of Materials By Will Paxton 3/5/07 Abstract The electrical properties of 5 different samples were studied. Characterization of these samples was through the dielectric properties‚ as this is a very important step. The capacitance was measured for each sample incrementally while heating them up to 135ºC. In a second part to the experiment‚ piezoelectric samples were studied‚ and their piezoelectric coefficient
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UNIT-I 1) Write a program to illustrate bitwise operators. 2) Write a program to print all the alphabets and their equivalent ASCII values. 3) Write a program to calculate the sum of squares of first n natural numbers using while loop. 4) Write a program to illustrate short hand operators used in C. 5) Write a program to print the multiplication table in the following format. 1 1 2 3 4 5 2 2 4 6 8 10 3 3 6 9 12 15 4 4 8 12 16 20 5 5 10 15 20 25 1 2 3 4 5 6) Write a program to calculate the
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