Friday, May 22, 2020
Organizational Culture - 778 Words
Organizational culture influences many aspects of work life. Workplace cultures that are grounded in strong and formally articulated values and modes of behavior define an organization. Well-communicated values influence employee behavior and drive how employees relate with all stakeholders within the organizationÃâ"from co-workers, management and members of the board to clients, shareholders and the community at large. When organizations seek to change their culture, HRÃâ"as change agent and educator of the change processÃâ"plays a significant role in this endeavor. In addition, HRs role is both up front and in the background, by leading, supporting, coaching, encouraging, measuring and evaluating the change during the process and over time.â⬠¦show more contentâ⬠¦The 2,000-member leadership team was first trained in immersion meetings before communicating the new vision and values to their own teams. Throughout the rollout, the communication team evaluated the mindsets and levels of interest and refined the content and delivery methods. Post-meetings surveys found that 100% of participants viewed the change initiative as effective to align and focus the organization. Going forward, changes in company programs and new initiatives are first evaluated through the PVB filter to link with the new cultural guidelines. As a leader and a follower, I believe that in order to promote organizational culture change, three essentials should be kept in mind. First, culture change should be tied to organizational business goals and, going forward, be linked to key organizational strategies. Second, throughout the process, the use of feedback mechanisms provides information to evaluate what is working and what needs to be improved. Third, by communicating regular updates to management and employees about the progress and benefits of the organizational change initiative, Human Resources can continue to keep the workforce engaged throughout the culturalShow MoreRelatedThe Importance Of Culture And Organizational Culture1647 Words à |à 7 PagesThe importance of culture in the organization The organization culture as a leadership concept has been identified as one of the many components that leaders can use to grow a dynamic organization. Leadership in organizations starts the culture formation process by imposing their assumptions and expectations on their followers. Once culture is established and accepted, they become a strong leadership tool to communicate the leader s beliefs and values to organizational members, and especially newRead MoreOrganizational Culture Essay731 Words à |à 3 Pages Edgar Schein, a famous theorists dealing with organizational culture, provides the following definition for the term: A pattern of shared basic assumptions that the group learned as it solved its problems that has worked well enough to be considered valid and is passed on to new members as the correct way to perceive, think, and feel in relation to those problems. (organizationalculture101) However, organizational culture is more than sharing assumptions used by a grou p to solve problems;Read MoreOrganizational Culture Essay1236 Words à |à 5 PagesOrganizational culture Culture is something that encompasses all of us. It helps us to understand how things are created, acknowledged, developed and managed. 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To understand oneââ¬â¢s behavior in an organizational culture it helps to understand the dominant culture in an organization and to figure out how individuals come to learn that culture and howRead MoreThe Term Organizational Culture Essay2100 Words à |à 9 PagesIntroduction A look at simply a couple of works that utilization the term organizational culture will uncover huge variety in the meaning of this term and much all the more in the utilization of the term society has no altered or extensively importance even in human sciences, however variety in its utilization is particularly discernible in the writing on hierarchical society. This is mostly identified with solid contrast in the reason and profundity of books and articles. Be that as it may, likewiseRead MoreThe Organizational Culture of Quinlans3389 Words à |à 14 PagesThe Organizational Culture of Quinlans Introduction Quinlan has been UKââ¬â¢s foremost retail giant for a long period of time. By end of 1998 there was evidence of a crisis and since then the company has been on a decline. The company has been ignoring market changes and trying to maintain its corporate image and identity. This has caused the customers to drift to more fashionable brands causing huge loss of business to Quinlan. Presently the company is on a restructuringRead MoreDefining Organizational Culture : An Organization2382 Words à |à 10 PagesDefining Organizational Culture With numerous meanings given to organizational culture, scholars claim that the field is grounded in the shared assumptions, attitudes, and behaviors accepted and enacted by employees within an organization, which affect its performance and overall welfare (Belias Koustelios, 2014). Another widespread definition of organizational communication often used by organizational scholars states that: ââ¬Å"Organizational culture is the pattern of basic assumptions that a groupRead MoreQuestions On Organizational Culture And Leadership914 Words à |à 4 PagesSchein, E (1992). Organizational Culture and Leadership. 2nd ed., San Francisco, CA: Jossey-Bass Edgar Schein outlines those characteristics in better understanding and assessing the culture and climate of an organization. A lot energy and emphasis is focused on the identification and application of an organizationââ¬â¢s guiding principles. Schein suggests that our guiding values and principles are important, but it is in the organizations structure, culture, action that describes the true character
Sunday, May 10, 2020
The Ultimate Handbook to Psychological Psychology Essay Topics
The Ultimate Handbook to Psychological Psychology Essay Topics Exams and testing has to be abolished. Speaking about general psychology, you can pick this issue from the entire course. Truth be told, psychology for a class is really tricky. In such a circumstance, a psychology essay example might be really valuable. Writing an amazing dissertation on educational psychology begins with the choice of a good topic. Applied psychology isn't possible. Learning and writing about psychological theories could be a fantastic direction of deciding on the specific category of psychology you wish to specialize in. The Importance of Psychological Psychology Essay Topics The best technique for thinking of a fantastic research question is reading! Chancing upon a topic for your study can be tough, but there are many great strategies to produce intriguing ideas. Once you've got an idea in mind, the next thing to do is to learn more about the way to run a psychology experiment. Finding the most suitable psychology experiment idea can be challenging, but since you can see there are lots of great approaches to develop inspiration. The intent of a psychology research paper, just enjoy any sort of scientific writing, is to find t he audience updated about developments in the psychology field. If you are searching for assistance with your essay then we provide a comprehensive writing service offered by fully qualified academics in your area of study. Although topics are rather important, the research methods are important too. Obviously, you wish to know where you are able to discover interesting research topics. The Upside to Psychological Psychology Essay Topics There are many spheres of the human activity where you are able to freely find relevant concepts. You can concentrate on the effects of the subsequent topics on the nature and development of a young child, adult or elderly. Other instances, like in an abnormal psychology program, might ask that you compose your paper on a particular subject like a psychological disorder. The big regions of social psychology ensure it is straightforward to comprehend study and control the important sections of study to be able to ensure it is feasible to influ ence the social behaviors. The New Fuss About Psychological Psychology Essay Topics Psychiatrists receive some training in the subject of psychology but not a wonderful deal. General psychology is a vast sphere of wisdom and the writer has a fantastic chance to choose among the large collection of ideas. Development psychology is centered on the lifespan of human beings, so you've got numerous topics to pick from. The Bizarre Secret of Psychological Psychology Essay Topics Topics are vitally important. Go on reading to discover quite a few topics that it is possible to consider. Great research topics can teach you a good deal of things. It is possible to go with many other available topics. You don't need to be an expert since you will find out more about the topic. Your instructor may offer you a list of articles to select from, or maybe you want to locate your own. You can depend on the ideal essay help online. Just like any research paper essay, the main thing is to construct your topic and paper with the robust evidence. For some assignments, you could possibly be requested to engage personally with the program material. Also, please be aware that you may use any title in our list free of charge. The title of your assignment automatically determines the research you are going to have to do to be able to be in a position to compose the paper.
Wednesday, May 6, 2020
Recrystallization of Benzoic Acid Free Essays
Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega Recrystallization is a method used to purify compounds, and this is a very important procedure because compounds are naturally impure. Polarity and solubility play a big role in this experiment and these characteristics are exploited in order to have a crystallization of the desired compound. In this experimented benzoic acid was crystallize using ethanol and water. We will write a custom essay sample on Recrystallization of Benzoic Acid or any similar topic only for you Order Now I chose these solvents based on part C of the experiment (table 1. 1). The compound is too soluble in ethanol but too insoluble in water. Benzoic acid is a polar compound in comparison with ethanol which is a less polar compound. However at low temperatures benzoic acid is insoluble in water. Compounds are soluble in solvents with the same polarity, like dissolves like. Table 1. 1 Benzoic Acid solubility Dissolve Heat Ice H2O No No No Ethanol Yes Yes Yes Hexane No No Acetone Yes Yes Toluene No Yes No The benzoic Acid was dissolved in a very small amount of hot ethanol once dissolved water was added drop wise using a disposable pipet until it got cloudy. Once it reached this point the substance was removed from the steam bed and let cool down at room temperature. It is important to let this cool down slowly so impurities donââ¬â¢t get trapped in between the crystals. After 20 minutes the crystals were filtered out using a vacuum filter method. The crystals were carefully removed from the filter paper and weighted. These crystals were dried out for a period of 2 weeks, to later get a melting point. The MSDS value was compared with the experimental value to verify purity of the crystals Page | 1 Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega Data Collected: Ethanol and Water used as solvents Benzoic acid Grams Started 0. 154 Recovered 0. 126 Final Recovered 0. 064 Percent Recovery 81. 81% *Before Drying for two weeks Final Recovery 41. 52% Melting Point 118. 9à ° C ââ¬â 119. 9à ° C MSDS MP 122. 4à ° C Percent difference 3. 684% Crystallizing benzoic acid using a mixture of solvents is the most efficient procedure compared to using one solvent alone. By comparing the experimental and MSDS melting points we can see that our recovered crystals had very little impurities only a 3. 8 % difference. If I was to repeat the experiment I would improve the recovery process by letting the substance cool down even more slowly to avoid impurities to get trapped in the crystals. When the crystals were moved from the filter paper to the weighing boat some of the crystals were lost. This could be improved by letting the sample dry longer so the crystals would not stick to the filter p aper or the spatula. Another possible error could have happened when taking the melting point, the rate at which the temperature was rising was a little too high. In the future slowly and gradually rising the temperature would give better more accurate results. Page | 2 Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega 3D embedded Structures à « Che m 3 D E m b e d à » Benzoic Acid à « Che m 3 D E m b e d à » Water Page | 3 Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega à « Che m 3 D E m b e d à » Ethanol References Zubrick (8th ed. ) Chs. 6, 11 and 13 Chemdraw Ultra Version 12. 0 Page | 4 How to cite Recrystallization of Benzoic Acid, Essay examples Recrystallization of Benzoic Acid Free Essays The objective of this experiment was to observe multi-step purification of benzoic acid after performing the extraction from a mixture containing benzoic acid, cellulose, and methyl orange. Recrystallization was done to remove impurities from the sample. The amount of BA recovered during recrystallization is much less than the extracted amount of BA. We will write a custom essay sample on Recrystallization of Benzoic Acid or any similar topic only for you Order Now The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure samples will have a lower and wider melting point range.The experiment performed was important because it provides important knowledge about the chemical nature and reactivityââ¬â¢s of various compounds that can be used in everyday life. Introduction Now that the desired compound is extracted, it still contains impurities. These impurities can be removed through a process called recrystallization. Recrystallization is a method for purifying solid compounds which are frequently the products of organic reactions. This theory is based on three important concepts. The first is that a compound is always more soluble in hot solvents than in cold solvents.Secondly, molecules have unique solubility properties. Lastly, a growing crystal will only accept similar entities into its lattice. This is related to the crystal lattice theory which states crystal formation is anti-entropic based on the equation ? G =? H-T? S. There are three stages of solubility: collision, dissociation, and solvation. In order to raise the probability of collision between the solute and solvent, heat is added to the system. When this occurs, the solute will attack the crystalline structure of the solute and start dissociation. As dissociation continues until all the molecules are free, solvation occurs.Choosing the right solvent is important when considering recrystallization. The solute must have a high temperature coefficient in the solvent: it must be soluble at high temperatures and insoluble at low temperatures, satisfying the first principle stated above. Also the boiling point of the solvent must be lower than the melting point of the solute. This will ensure that the solute dissolves in the solvent and does not melt. The solvent must also be inert to prevent chemical interactions with the solute. Impurities must either be readily dissolved in the solvent or be insoluble.The solvent must also be volatile, and finally, it would be beneficial to the experimenter if the solvent is relatively inexpensive. Once the color and most impurities are removed, the crystals can be formed in the solution through a process called nucleation. Nucleation can be induced by slowly cooling the solution to room temperature. It is important to do this slowly so that small solute resembling impurities do not enter the crystal lattice, as described by the third principle of recrystallization. Chemists often add already pure crystals of the solute to the solution in order to provide a pre-formed lattice for other molecules to enter. This is called seeding. Scratching the glass container in which the solution is contained with a glass stir rod will also induce nucleation on microscopic glass particles. The concept of scratching is similar to that of seeding. Finally, nucleation can be induced by cooling the solution farther in an ice bath; however, this is only a last resort option due to its least efficiency to bring forth crystals. The crystallized solute can then be collected by vacuum filtration. There is a difference observed in the physical properties of the pure compound and the impure mixture. One of the tests of purity is melting point. Melting point is an intrinsic, or intensive, property; the value is independent of the quantity of the substance. Melting point is the temperature at which a substance changes physical state from solid to liquid. Because the substance will have a certain shape and surface area exposure, there will be a time interval in which the melting occurs. Thus, it is more accurate to refer to this as melting range. Melting range encompasses the temperature at which the first particles can be seen turning from solid to liquid until all the sample is in the liquid state. Purer samples have smaller melting ranges.Perfectly pure compounds will have ranges of only 1-2à °C. Impurities lower melting point below literature values and also widen the range between which melting occurs. New techniques and equipment used were used during both parts of the purification process. Activated charcoal was used to adsorb impure colored products. Gravity filtration was used to remove insoluble products which were impurities. Fluted filter paper was used to catch more of the impurities. A heating mantel was introduced during recrystallization. It is a heat source used for solutions. For determining the melting point of benzoic acid, a Mel-Temp apparatus was use.It is used for determining when a small amount of a solid begins to melt and when the melting ends while recording the temperatures, respectively. Experimental: Recrystallization Lab: Initially, took a small amount of impure BA to the side for following weekââ¬â¢s lab. The impure BA crystals were weighed, using an analytical balance, and then placed in a 250 mL Erlenmeyer flask. 200 mL of water was boiled (with boiling stones) in a 250 mL round bottom flask using a heating mantel. The boiled water was added slowly to the benzoic acid crystals. Only enough water was added to dissolve the BA crystals. For the rest of the lab the Erlenmeyer flask was kept on a steam bath. Charcoal was added to the BA solution and then gravity filtered using a funnel with fluted filter paper. The filtrate was collected in a 250 mL Erlenmeyer flask. If color in the BA solution still remained then charcoal should be added again. The BA solution was removed from the steam bath and cooled, preferably on a window sill. If crystals did not form while cooling on window sill, use another method to induce nucleation to the start the formation of crystals. The crystals were collects by vacuum filtration and placed on a watch glass to dry. Melting Point of Benzoic Acid: A melting point tube was loaded with BA crystals by inverting the tube into the BA crystals on the watch glass. The tube was packed by dropping through a funnel. The Mel-Temp apparatus was used to determine the melting point range. A rapid melting range experiment was done first and then a slow melting range experiment was carried out to get a better range. Results: Recrystallization lab: Observations: Not much charcoal was used to adsorb the colored molecules The BA crystals were small, shiny, flaky, and white. Almost comparable to texture of dandruff. Data: Mass of extracted Benzoic Acid = 2. 3 g Mass of recrystallized Benzoic Acid = 1. 84 g Calculations: Percent (%) recovery =(weight after recrystalization)/(mass crude BA) ? 100 Percent (%) recovery =(1. 84 g)/(2. 43 g) ? 100=75. 72% Melting Point lab: Observations: Once the benzoic acid began to melt, it happened very quickly.It was hard was difficult to watch the melting and recording the start and end temperature. The crude BA had a lower and wider melting point range. Data: Melting Point Ranges RunCrude (Impure) Benzoic Acid (à °C)Purified Benzoic Acid (à °C) Fast 110. 2-118. 4 at 4. 5 selectivity (Range: 8. 2)115. 4-118. 5 at 4 selectivity(Range: 3. ) Slow113. 2-117. 3 selectivity (Range:4. 1)117. 5-120. 0 selectivity (Range: 2. 5) Discussion ; The goal of recrystallization and determining melting point labs were to explore the techniques used to obtain pure samples from desired compounds. After the extraction the goal was to recrystallize the benzoic acid and determine the percent recovery. Then the goal was to determine the melting point range of the recrystallized benzoic acid and compare it to the melting range of the small sample of the impure benzoic acid. 1. 84 grams of pure benzoic acid was obtained, which was calculated to be 75. 2% from the 2. 43 grams of impure benzoic acid.The percent recovery from the impure sample shows that about three fourths of the sample was able to be collected as pure benzoic acid, and that 0. 59 g of the impure benzoic acid was impurities. From this the experimenter can infer that the pure benzoic acid accounted for most of the mass or that little benzoic acid was lost with the removal of the impurities. Also, there is always a chance that some of the benzoic acid may have remained in the solution instead of crystallizing. Also, using an ice-bath to induce nucleation could have lowered my results or recrystallization because it was the last resort to crystalize the solute. Maybe adding too much charcoal could have adsorbed some of the solute. The charcoal was used to adsorb any of the cellulose (which is the reason for the color) that was left behind. Not too much charcoal was actually used; however, my benzoic acid solution did not have much color so charcoal may not have been needed. Note that the initial value for percent recovery is slightly less than the extracted mass because of the impure benzoic acid set aside for the melting point comparison. The total composition from the very first starting benzoic acid mixture is only 44. 2% (1. 84 grams / 4. 17 grams). Considering practical purposes of recrystallization, one comes to realize how important it is to make this processes as efficient as possible to save money and gain as much product as possible, for example with ibuprofen purification for the pharmaceutical industry. The purity of the sample is shown by the melting range. As expected, the pure benzoic acid had the smallest melting point range of 2. 5à °C. From this, one can tell that this sample was not perfectly pure because pure compounds have melting point ranges of less than 1à °C.There may have been some impurities left in the sample since activated charcoal was not used for this sample. Human error while scraping the impure mixture from the funnel and also from the Erlenmeyer flask would result in a decreased yield. Also, the nucleation may have had some impurity particles collect in the lattice when recrystallizing. After performing the rapid and slow experiment, the temperatures (especially for the pure BA) were not similar. This was probably due to what is called thermometer lag. If the Mel-Temp apparatusââ¬â¢ selectivity was higher than the temperature readings were not as accurate as the slow experiment.The actual value for the melting range coincides with the literature value of 122. 4à °C given in the reagent table. The impure sample, however, had a significantly larger melting range of 4. 1à °C. Also, the impure sample had a lower temperature. This is because impurities disrupt lattice forces and decrease the energy required to break the intermolecular bonds between benzoic acid molecules. One way that this experiment could have been improved is to have more space to perform the various steps in the lab. A lot of the mistakes and errors committed (i. e. pillage) were due to crowding of various equipment that were closely packed next to each other. Overall, theses labs were a success be the experimenter was able to achieve the goals of each lab. The benzoic acid was able to recrystallize and the melting point was fairly close to the literature value even with possible errors performed in lab. Works Cited Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc. 22 July 2004. Thurs. 7 Oct. 2010. Zubrick, James. The Organic Chem Lab Survival Manual. 6th. Pittsburgh: John Wiley Son, Inc. , 2008. Print. How to cite Recrystallization of Benzoic Acid, Papers Recrystallization of Benzoic Acid Free Essays Recrystallization of Benzoic Acid Objective To purify benzoic acid by recrystallization and gain experience with a basic organic laboratory techniques. Background Products of chemical reactions are often contaminated with impurities. One method for purifying chemicals, recrystallization, takes advantage of the differences in the solubilities of the desired products and the impurities and the tendency for the slow formation of crystals to exclude impurities from the crystalline solid. We will write a custom essay sample on Recrystallization of Benzoic Acid or any similar topic only for you Order Now HC HC HC CH C CH MgBr + CO2 + HCl HC HC HC CH C CH CO2H ClMgBr Benzoic acid, the chemical that we will be purifying, can be made by reacting phenylmagnesium bromide with carbon dioxide. When the product of that reaction is treated with hydrochloric acid, benzoic acid is formed. From the balanced chemical equation, it is clear that the benzoic acid will not be pure since the byproduct MgClBr, an ionic solid, forms at the same time the desired product forms. Benzoic acid can be separated from ionic solids because the materials have different solubilities in water. At room temperature, benzoic acid is not particularly soluble in water, whereas ionic solids like MgClBr are. Thus, adding water to the crude reaction products will dissolve the ionic solid, and nearly all of the benzoic acid will remain undissolved. If the suspension were filtered, much of the impurity would be washed away; however, the resulting product wouldnââ¬â¢t be as pure as a recrystallized product. To take advantage of the extra purity garnered by crystallization, all of the benzoic acid must be dissolved. On the other hand, the benzoic acid needs to come back out of solution to crystallize. Simply adding room-temperature water cannot accomplish this goal; once the benzoic acid is dissolved there would be no reason for it crystallize. Since benzoic acid is much more soluble in hot water as compared to cold, small amounts of hot water are added to dissolve the benzoic acid. If the hot, saturated, aqueous solution of benzoic acid is cooled, the solution becomes supersaturated, and the supersaturated solution crystallizes. Procedure 1. Obtain a sample of copper(II) sulfate contaminated benzoic acid. 2. Add approximately 0. g (record the actual mass) of the contaminated benzoic acid and 5 mL of water to a 25-mL Erlenmeyer flask. 3. Warm the flask and its contents on a hot plate and slowly add near-boiling water to dissolve the solids. 4. Continue to warm the flask and add near-boiling water until all of the solids have disolved 5. Remove the flask from the hot plate and allow it to cool slowly on the bench top. Covering the flask with a beaker can help slow the rate at which the solution cools. After approximately twenty minutes, crystals will have formed. Cool the suspension further using an ice bath. If crystals have not formed after 20 minutes, there are a few techniques that can be used to coax the crystals out of solution. Often scratching the glass container with a glass rod will induce crystallization. Alternatively, a seed crystal can be obtained by evaporating a drop of the solution on the tip of a stirring rod or spatula. Returning this seed crystal to the super saturated solution will cause crystals to form. 6. Transfer the crystals to a Hirsch funnel, and filter the benzoic acidââ¬âwater suspension. . Wash the benzoic acid crystals with ice-cold water by pouring ice-cold water over the crystals. 8. Dry the crystals on the Hirsch funnel; that is, allow the vacuum filtration system to draw air through the crystals until the mass of the crystals remains relatively constant. Place the benzoic acid in your drawer and allow it to dry completely. 9. While the benzoic acid is drying, evaporate the water from the aqueous CuSO4 s olution. Remember to add a magnetic stir bar to your flask to lower the risk of spattering. 10. Note the appearance of your CuSO4, and, if possible, record the mass of the CuSO4 that you obtained. 11. After allowing the benzoic acid crystals to dry for a week, determine the mass and the melting point of the benzoic acid. Experimental Report Write an ââ¬Å"experimentalâ⬠describing the procedure that you followed to recrystallize the benzoic acid. A first draft of the experimental is due one week after steps 1ââ¬â10 have been completed. A final copy that includes the final mass and the melting point of the benzoic acid is due one week after step 11 is completed. How to cite Recrystallization of Benzoic Acid, Papers
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