Gravimetric Analysis Definition

Gravimetric Analysis Definition Gravimetric analysis is a collection of  quantitative analysis laboratory techniques  based on the measurement of an analytes mass. One example of a  gravimetric analysis technique  can be used to determine the amount of an ion in a solution by dissolving a known amount of a compound containing the ion in a solvent to separate the ion from its compound. The ion is then precipitated or evaporated out of solution and weighed. This form of gravimetric analysis is called precipitation gravimetry. Another form of gravimetric analysis is volatization gravimetry. In this technique, compounds in a mixture are separated by heating them to chemically decompose the specimen. Volatile compounds are vaporized and lost (or collected), leading to a measurable reduction on the mass of the solid or liquid sample. Precipitation Gravimetric Analysis Example In order for gravimetric analysis to be useful, certain conditions must be met: The ion of interest must fully precipitate from solution.The precipitate must be a pure compound.It must be possible to filter the precipitate. Of course, there is error in such an analysis! Perhaps not all of the ion will precipitate. They may be impurities collected during filtration. Some sample may be lost during the filtration process, either because it passes through the filter or else is not recovered from the filtration medium. As an example, silver, lead, or mercury may be used to determine chlorine because these metals for insoluble chloride. Sodium, on the other hand, forms a chloride that dissolves in water rather than precipitates. Steps of Gravimetric Analysis Careful measurements are necessary for this type of analysis. Its important to drive away any water that may be attracted to a compound. Place an unknown in a weigh bottle that has its lid cracked open. Dry the bottle and sample in an oven to remove water. Cool the sample in a desiccator.Indirectly weigh a mass of the unknown in a beaker.Dissolve the unknown to produce a solution.Add a precipitating agent to the solution. You may wish to heat the solution, as this increases the particle size of the precipitate, reducing loss during filtration. Heating the solution is called digestion.Use vacuum filtration to filter the solution.Dry and weigh the collected precipitate.Use stoichiometry based on the balanced chemical equation to find the mass of the ion of interest. Determine the mass percent of the analyte by dividing the mass of analyte by mass of unknown. For example, using silver to find an unknown chloride, a calculation might be: Mass of dry unknown chloride: 0.0984Mass of AgCl precipitate: 0.2290 Since one mole of AgCl contains one mole of Cl- ions: (0.2290 g AgCl)/(143.323 g/mol) 1.598 x 10-3 mol AgCl(1.598 x 10-3)x(35.453 g/mol Cl) 0.0566 g Cl (0.566 g Cl)/(0.0984 g sample) x 100% 57.57% Cl in unknown sample Note lead would have been another option for the analysis. However, if lead had been used, the calculation would have needed to account for the fact one mole of PbCl2 contains two moles of chloride. Also note, error would have been greater using lead because lead is not completely insoluble. A small quantity of chloride would have remained in solution instead of precipitating.

Othello - Character Analysis Essay Example | Topics and Well Written Essays - 1250 words

Othello - Character Analysis - Essay Example With this dark side he is also very extroverted, and not very bright. He isn't observant and the schemes of Iago work well on him. Though he doesn't brood too much on his past, except occasional ventures of wars fought, he does let his emotions run his life. "Othello's condition as a black man--whatever shade of blackness he was--is further complicated by his condition as a colonial subject who wishes to adopt western culture. The play dramatizes the apparently unlimited possibilities of self-fashioning available to man in the Renaissance, only to deconstruct this optimistic self-fashioning or self-creation when race issues come into play. It is Iago's exploitation of the politics of colour and of Othello's double nature (proper to a colonial subject) that brings about Othello's downfall." ( Ana Mara Manzanas , Miscelnea: A Journal of English and American Studies Vol. 17 ,1996) For all the dangers and encounters he has been involved in, this man is still naive of the corruptness of people around him. Othello has a trusting nature in which he gives it all. He put all his trust in Iago during times of war and during Othello's marriage to Desdemona. This wasn't very wise of Othello, even if he wasn't trusting or more corrupt he still wouldn't realize Iago was lying. Everyone considered Iago as honest, and would be out of character for Othello to believe any different. One Othello's strong characteristic is the ability to take control over any situation. For example, when Barbantino comes to kill him he shows astounding power by saying: "Hold your hands, both of you of my inclining and the rest. Were it my cue to fight, I should have known it without a prompter" (I, ii, lines 80-3) Through the whole first act he is portrayed as a man with so much power and natural leadership and the drastic change in his personality towards the end is unbelievable. For example, when Lodovico had witnessed Othello hit Desdemona, he said: "Is this the noble Moor whom our full Senate Call all in all sufficient Is this the nature Whom passion could not shake whose solid virtue The shot of accident nor dart of chance could neither graze nor pierce" (IV, i, lines 264-8) Another place where Shakespeare shows Othello taking control over a situation is when Cassio and Montano are fighting after Roderigo antagonized him. You must feel sorrow for Othello because with all the power he has and the endless trust he gives, you try to reach out and show him the truth. Taylor makes an apt comparison with King Lear and Hamlet as follows: "There is no ferocity in Othello; his mind is majestic and composed. He deliberately determines to die; and speaks his last speech with a view of showing his attachment to the Venetian state, though it had superseded him. Schiller has the material Sublime; to produce an effect, he sets you a whole town on fire, and throws infants with their mothers into the flames, or locks up a father in an old tower. But Shakspere drops a handkerchief, and the same or greater effects follow. Lear is the most tremendous effort of Shakspere as a poet; Hamlet as a philosopher or meditator and Othello is the union of the two. There is something gigantic and unformed in the former two; but in the latter, everything assumes its due place and proportion, and the whole mature powers of his mind are displayed in admirable equilibrium". ( COLERIDGE, SAMUEL TAYLOR, 1822, Table Talk, Dec. 29). Othello had a dominant streak of jealousy in him. He was told

Ned Kelly Business Plan Essay Example | Topics and Well Written Essays - 1000 words

Ned Kelly Business Plan - Essay Example Budgeting in business is beneficial not only because it enables projecting the yearly expenses to be incurred while following a certain plan, but it also allows to determine how costs will incur and how can they be controlled resulting in efficient operations (Dury, 2008; Albrecht et al., 2008). As for instance, without doing any budgeting of the business activities, an entrepreneur may only be able to visualize to a certain extent that what expenses will be incurred and how they will be financed and what revenues would be required to keep the business profitable. But, on the other hand, with budgeting the entrepreneur is in fact able to foresee that what expenses will be incurred and how much revenues will be required to cover those expenses and at the end make profits. This in turn allows not only setting up targets for revenue generation, but also allows ascertainment of cost controlling techniques (Jiambalvo, 2010; Horngren & Harrison, 2009). In this regard, cash budgeting is con sidered as one of the most beneficial and important procedure to forecast the results of a certain business approach or plan on monthly basis (Horngren & Harrison, 2009). ... Keeping in view these benefits, cash budget can also be prepared for taxi business and revenues and expenses can be forecasted, which can be then used to ascertain the required working capital to be raised. Apart from this, as it has been noted that the owner of the taxi business requires the amount of money required to be taken from bank to be ascertained prior to starting the business. In this regard, it is pertinent to ascertain the cash inflows and outflows expected from a year’s operations and the net profit or loss which will be earned by the business. Having taken into consideration the information provided for the case, income statement and cash budget has been prepared and presented as follows for the business to be started by Ned Kelly. Income Statement The income statement forecasted for Ned Kelly’s business has been presented as follows: Forecasted Income Statement Amount Sales ? 417,312.00 Less: Â   Diesel (15 % of Total Sales Revenue) - ? 59,875.20 Mainte nance Costs (? 120 per taxi per month) - ? 4,320.00 Annual Road Tax and Licence Fee (3 x ? 600) - ? 1,800.00 Drivers' Salaries per Month (9 x ? 24,000 / 12) - ? 216,000.00 Drivers' Social Security (10 % of Gross Annual Salary) - ? 21,600.00 Cost of Sales - ? 303,595.20 Gross Profit ? 113,716.80 Depreciation - ? 12,000.00 Office Staff's Salaries per Month (4 x ? 16,000 / 12) - ? 64,000.00 Office Staffs' Social Security (10 % of Gross Annual Salary) - ? 6,400.00 Utility Costs - ? 6,000.00 Rent - ? 18,000.00 Local Property Tax Charges - ? 5,000.00 Drawings - ? 30,000.00 Advertisement - ? 6,000.00 Net Profit - ? 33,683.20 Sources: (Albrecht et al., 2008; Dury, 2008; Horngren & Harrison, 2009; Jiambalvo, 2010) It can be observed

Npcst Library System Essay Example for Free

Npcst Library System Essay A collection of such materials, especially when systematically arranged; a room of private home for such collection. At first glance, your library is a bunch of books with a librarian to check them out to you, and back in when you return them. Librarian ensures (of tries to, as money permits) your library is well stocked with current titles. These current titles include, in addition to books, videos, tapes and CDs, magazines, encyclopedia, genealogical research stuff and more. The librarian also has to keep the building neat and in good repair and also these things only shows a few of the things which make up your library. Schools set the various pedagogical changes to achieve the current level of education in other countries. Because of the growing numbers of computer users, this became an effective medium to demonstrate the knowledge and skills of the students. From the traditional searching process for the books in the libraries, the interactive usage of computers can be now addressed as part of the library system.

lord of the rings Essay -- essays research papers

The Two Towers Main Characters- Frodo Baggins, a hobbit, the main character of the story, the bearer of the evil ring, sent to destroy it in the fires of Mount Doom. He is very strong, but has trouble sometimes making choices, and sometimes makes wrong ones, wields Sting the dagger of his Uncle Bilbo Baggins. Samwise Gamzee, a hobbit, Frodo’s companion on his journey to destroy the ring, he is always looking out for Frodo, to help him in any way he can, wields a dagger, sword to him. Pippin Took, a hobbit, Frodo’s constant companion until captured by the Orcs, with Merry, and finally escape, and find the Ents, and go to defeat Saruman. Merry, a hobbit, Frodo’s constant companion until captured by the Orcs, with Pippin, and finally escape, and find the Ents, and go to defeat Saruman. Gandalf the white, the wizard on the journey helps make most of the decisions until he, and Frodo are split up, then goes after Saruman to defeat him, and his tower, wields a great wizard staff. Aragorn heir to the king of Gondor, Frodo’s companion until they are split up, then goes after Pippin, and Merry to save them, and after he finds them helps Gandalf defeat Saruman, wields broken sword restored which helped defeat Sauron. Legalos, a young elf, rides with Aragorn and Gimli through the book to help with what he can, wields a bow. Gimli, a dwarf, who goes with Aragorn, and then with Gandalf, he wields an axe, and will fight to the death. Gollum- A once man corrupted by the ring, now ...

The Scarlet Pimpernel

orth As A The Scarlet Pimpernel: Sir Percy’s Worth as A Hero In the novel The Scarlet Pimpernel, written by Baroness Orczy, Sir Percy Blankley is able to deceive those he loves in order to save the lives of those he barely knows. Leading a double life, he acts as a fool of an English lord in order hide the fact that he is really a cunning, elusive man who goes by the name â€Å"The Scarlet Pimpernel. † When using this name to do his good deeds, Sir Percy risks his life in order to rescue French aristocracy.Everyone regards The Scarlet Pimpernel as a hero– he has all the characteristics of a hero about him, and they are very strong in his personality. Sir Percy is also very good at disguising his hero’s true identity, although he did have rather oblivious people around him. He was a hero who did what he needed to do proficiently and did so without unnecessary violence. During the 1790s, The French Revolution was tearing apart France. Commoners killed the ve ry people they were to look to for leadership. Those aristocrats had been irresponsible and had spent taxes frivolously and now the commoners wanted justice.In England at that time, things were much different. The people were at peace and society was moving forward. The stark difference between these places provides excellent settings for the book, helping the reader realize the cruelty of the French peoples’ endless killing, as opposed to the serenity and peacefulness of England. Sir Percy could be described as many things. One of these characteristics is selflessness. It is shown how even the people around him could easily tell of how he would gladly sacrifice his life for theirs– â€Å"She looked at Sir Andrew with eager curiosity.The young man’s face had become almost transfigured. His eyes shone with enthusiasm; hero-worship, love, admiration for his leader seemed literally to glow upon his face. ‘The Scarlet Pimpernel, Mademoiselle,’ he said at last, ‘is the name of a humble English wayside flower; but I also the name chosen to hide the identity of the best and bravest man in all the world, so that he may better succeed in accomplishing the noble task he has set himself to do. ’ † (Orczy 34). Another fine example of this characteristic is from the perspective of one whom he rescues ¬Ã¢â‚¬â€œ â€Å"But the Comtesse shook her head, still incredulously.To her it seemed preposterous that these young men and their great leader, all of them rich, probably wellborn, and young, should for no other motive than sport, run the terrible risks, which she knew they were constantly doing. Their nationality, once they had set foot in France, would be no safeguard to them. Anyone found harbouring or assisting suspected royalists would be ruthlessly condemned and summarily executed, whatever his nationality might be. † (Orczy 35). Comtesse finds it so uncanny that a rich Englishman would waste his time and ris k his life for people with whom he has no relationship.This kind of rare selflessness is easily comparable to that of the classic Marvel superhero Captain America– each of them would willingly give up his life if it meant another might live. The Scarlet Pimpernel demonstrates his bravery very well. He is willing to got to France in order to save his wife’s brother– â€Å" ‘You are not going to the North, I feel convinced†¦ There is some mystery†¦ and †¦Ã¢â‚¬â„¢ ‘Nay, there is no mystery, Madame,’ he replied, with a slight tone of impatience. ‘My business has to do with Armand†¦ there! Now, have I your leave to depart? ‘With Armand? †¦ But you will run no danger? ’ â€Å"Danger? I? †¦ Nay, Madame, your solicitude does me honour. As you say, I have some influence; my intention is to exert it before it be too late’ † (Orczy 136). He is unafraid to go to Armand’s aid, which the reader can find as extraordinary, seeing as how he would have to go up against the deadly French agent M. Chauvelin. He also sees the fact that his wife needs him to take action as an honor, and he carries out her requests with pride– â€Å" ‘You will come back? ’ she said tenderly. Very soon! ’ he replied, looking longingly into her blue eyes. ‘And†¦ you will remember? †¦Ã¢â‚¬â„¢ she asked as her eyes, in response to his look, game him an infinity of promise. ‘I will always remember, Madame, that you have honoured me by commanding my services’ † (Orczy 138). His valor and fearlessness is uncommon, and can be respected. Such honor and bravery resembles that of Steve Jobs. He had a predetermined goal and a strong will to accomplish this task, daring to do what others thought was impossible and would not dare to do.A beautiful portrayal is of Sir Percy’s passion is when he is torn between the one he loves and doing his duty as the Scarlet Pimpernel– â€Å" ‘I pray you, Madame,’ he said, whilst his voice shook almost as much as hers, ‘in what way can I serve you? ’ † (Orczy 128). He knew he must return to France to help the Comte de Tournay, but yet such love and passion for his wife cannot be hidden. Because he cannot reveal the fact that he is the Scarlet Pimpernel to his beloved wife, he must act as a fool who does not have much feeling towards her [his wife], but when he has the chance, he shows affection in hat little was he can– â€Å"He was but a man madly, blindly, passionately in love, and as soon as her light footsteps had died away within the house, he knelt down upon the terrace steps, and in the very madness of his love he kissed one by one the places where her small foot had trodden, and the stone balustrade there, where her tiny hand had rested last. † (Orczy 131). Such enthusiasm for something is very similar to Walt Disneyà ¢â‚¬â„¢s passion to create a ‘perfect society’ for adults and children. He went above and beyond the duty he put before himself, just as Sir Percy did.The â€Å"elusive [Scarlet] Pimpernel† (Orczy 97) is surely a great hero. Having all of the ‘requirements’ and characteristics of a hero, he is able to spring into action– ready to save the day! He is not recognized by his enemies and is able to fulfill all of the tasks he puts before him. He is diligent at what he does and only uses force when necessary. With his 19 assistants by his side, he is able to save the lives of the French aristocracy and bring them to safety. Sir Percy Blankley, a. k. a. The Scarlet Pimpernel, is a hero– no doubt about it.

WEBER Surname Meaning and Family History

Weber is an occupational surname given to one skilled in the ancient craft of weaving, from the Middle High German word wà «ber,  a derivative of weben, meaning to weave.  The Weber surname is sometimes Anglicized as Webber or Weaver. Weber is the 6th most common German surname. It is also frequently found as a  Czech, Hungarian, Polish or  Slovenian surname.  WEBB and  WEAVER are English variants of the name. Surname Origin: German Alternate Surname Spellings:  WEEBER, WEBBER, WEBERE, WEBERER, WAEBER, WEYBER, WEBERN, VON WEBER, VON WEBBER Famous People With the WEBER  Surname Max Weber  -  19th-century German sociologist and one of the founders of modern sociologyCarl Maria von Webber -  German composer, conductor, pianist and  guitaristConstanze Weber - wife of Wolfgang Amadeus MozartAlfred Weber - German economist, geographer, and sociologistJohn Henry Weber - American fur trader and explorerJoseph Weber - American physicistLudwig Weber -  German Protestant pastor and social reformer Where Is the WEBER Surname Most Common? According to surname distribution from Forebears, WEBER is the 3rd most common surname in Germany. It is also very common in Switzerland, where it ranks 7th, and Austria, where it is the 19th most prevalent last name. While Weber is common throughout Germany, WorldNames PublicProfiler indicates it is most frequent in southwestern Germany, in the regions of Rheinland-Pfalz, Saarland, and Hessen. Weber is also a very common surname in Gussing, Austria. Genealogy Resources for the Surname WEBER Weber  Family Crest - Its Not What You ThinkContrary to what you may hear, there is no such thing as a Weber  family crest or coat of arms for the Weber surname.  Coats of arms are granted to individuals, not families, and may rightfully be used only by the uninterrupted male-line descendants of the person to whom the coat of arms was originally granted. Weber Y-Chromosome DNA  Surname ProjectWEBERs from all over the world are participating in this group DNA project in an attempt to learn more about Weber family origins. The website includes information on the project, the research done to date, and instructions on how to participate. WEBER  Family Genealogy ForumFree message board is focused on descendants of Weber  ancestors around the world. FamilySearch - WEBER  GenealogyExplore over 5 million results from digitized  historical records and lineage-linked family trees related to the Weber  surname on this free website hosted by the Church of Jesus Christ of Latter-day Saints. WEBER  Surname Mailing ListFree mailing list for researchers of the Weber  surname and its variations includes subscription details and a searchable archives of past messages. DistantCousin.com - WEBER  Genealogy Family HistoryExplore free databases and genealogy links for the last name Weber. GeneaNet - Weber  RecordsGeneaNet includes archival records, family trees, and other resources for individuals with the Weber  surname, with a concentration on records and families from France and other European countries. The Weber Genealogy and Family Tree PageBrowse genealogy records and links to genealogical and historical records for individuals with the Weber  surname from the website of Genealogy Today. References: Surname Meanings & Origins Cottle, Basil.  Penguin Dictionary of Surnames. Baltimore, MD: Penguin Books, 1967.Dorward, David.  Scottish Surnames. Collins Celtic (Pocket edition), 1998.Fucilla, Joseph.  Our Italian Surnames. Genealogical Publishing Company, 2003.Hanks, Patrick, and Flavia Hodges.  A Dictionary of Surnames. Oxford University Press, 1989.Hanks, Patrick.  Dictionary of American Family Names. Oxford University Press, 2003.Reaney, P.H.  A Dictionary of English Surnames. Oxford University Press, 1997.Smith, Elsdon C.  American Surnames. Genealogical Publishing Company, 1997.