The Chemical Reaction That Causes Rust

The Chemical Reaction That Causes Rust Rust is the common name for iron oxide. The most familiar form of rust is the reddish coating that forms flakes on iron and steel (Fe2O3), but rust also comes in other colors, including yellow, brown, orange, and even green! The different colors reflect various chemical compositions of rust. Rust specifically refers to oxides on iron or iron alloys, such as steel. Oxidation of other metals has other names. There is tarnish on silver and verdigris on copper, for example. The Chemical Reaction That Forms Rust Although rust is considered the result of an oxidation reaction, its worth noting not all iron oxides are rust. Rust forms when oxygen reacts with iron  but simply putting iron and oxygen together isnt sufficient. Although about 20 percent  of air consists of oxygen, rusting doesnt occur in dry air. It occurs in moist air and in water. Rust requires three chemicals to form: iron, oxygen, and water. iron water oxygen  Ã¢â€ â€™Ã‚  hydrated iron(III) oxide This is an example of an electrochemical reaction and corrosion. Two distinct electrochemical reactions occur: There is anodic dissolution or oxidation of iron going into aqueous (water) solution: 2Fe  Ã¢â€ â€™Ã‚  2Fe2  Ã‚  Ã‚  4e- Cathodic reduction of oxygen that is dissolved into water also occurs: O2  Ã‚   2H2O 4e-  Ã¢â€ â€™Ã‚  4OH-  Ã‚   The iron ion and the hydroxide ion react to form iron hydroxide:   2Fe2   4OH-  Ã‚  Ã¢â€ â€™Ã‚  2Fe(OH)2 The iron oxide reacts with oxygen to yield red rust, Fe2O3.H2O Because of the electrochemical nature of the reaction, dissolved electrolytes in water aid the reaction. Rust occurs more quickly in saltwater than in pure water, for example. Keep in mind oxygen gas, O2, is not the only source of oxygen in air or water. Carbon dioxide, CO2, also contains oxygen. Carbon dioxide and water react to form weak carbonic acid. Carbonic acid is a better electrolyte than pure water. As the acid attacks the iron, water breaks into hydrogen and oxygen. Free oxygen and dissolved iron form iron oxide, releasing electrons, which can flow to another part of the metal. Once rusting starts, it continues to corrode the metal. Preventing Rust Rust is brittle, fragile,  progressive, and weakens iron and steel. To protect iron and its alloys from rust, the surface needs to be separated from air and water. Coatings can be applied to iron. Stainless steel contains chromium, which forms an oxide, much like how iron forms rust. The difference is the chromium oxide does not flake away, so it forms a protective layer on the steel.

The Rule of St. Benedict and Beowulf books Essay

The Rule of St. Benedict and Beowulf books - Essay Example The Rule of St. Benedict was written at a time when the world was ravaged by great political and economic upheaval brought about by warfare. It was during this time that there was immense chaos and hardship and there was no integrated community whatsoever. Even the monks and hermits spent their lives in tiny cells, huts or caves with self imposed hard rigor. Most of them lived on bread-crusts, indulged in self-flagellation for decades together. Saint Benedict understood that such living was not healthy for community living and therefore revolutionized the existing rules to make life much better. The most important thing he did was to allocate specific time for different activities. He divided the Pg. 2 day by setting aside time for work, prayer, study, relaxation and sleep respectively. This arrangement was rather innovative and well accepted all around since it made life much easier to lead even while creating a good community atmosphere by bringing about order in their daily lives. An ideal ruler always wants the best for his subjects and considering the masterpiece he offered his subjects, there is no doubt that St. Benedict could be called an ideal ruler because he had the good of his people at heart. As a good ruler he was responsible for bringing about peace and harmony through community life by releasing his people from the bondage of hardship and chaos. Even though Benedict was a monk himself, he was not a rigid taskmaster who penalized his subjects. In fact, in his book he states that these rules were ‘nothing harsh, nothing burdensome.’ (St. Benedict ( 1998) On the other hand, he was a concerned leader who wanted to bring about order and peace in his environment. Benedict’s rule is an integral and invaluable guide to us in this contemporary society because it forms the basis of order and structure in our daily lives. Benedict’s vision of order was aimed at bringing people much closer to God. According to Benedict, all indivi duals are equal before God and therefore equality within a community lays the foundation for spirituality and drawing people closer to the Divine. Benedict’s rules have great significance and Pg. 3 relevance in today’s society as it continues to help us maintain order and discipline in our lives. Beowulf is in sharp contrast to ‘The Rule of St. Benedict’ because it is a narrative that comprises of both fact and fiction. It is a mixture of images of people and creatures who are less human and comprises of both comedy and tragedy. Written in the early part of the tenth century A.D. Beowulf is one of the oldest epics in British literature that has managed to survive. Presently a house timber British library in London, Beowulf describes the interesting adventures of a well known Scandinavian warrior belonging to the 6th century. While ‘The Rule of St. Benedict’ is based on factual evidence of real people within a real environment, ‘Beowulfâ €™ is based on fact as well as fiction to express the thoughts and ideas of its author. Throughout the narrative, the author speaks of the descendants of each warrior, the conquests they fought and the manner in which they lost their lives, but constantly keeps close proximity with the Divine and expressing that God is ever present and is a solace and guide to mankind. One such warrior was Shield who though was an orphan, put an end to many enemies and took care of his people like a good king. This idea of a good king is

8 Nov 1942 Northwest Africa Assignment Example | Topics and Well Written Essays - 1250 words

8 Nov 1942 Northwest Africa - Assignment Example The Allies were the first immigrants from the United States to settle in North Africa. The Axis was a combination of forces, which were against the allies for instance Italy and Germany. It began as early as July 1942 when the Allies agreed on a proposal that it was very illogical for small-scale operations to take over the Northern France region. However, in the agreement, it was clear that landings must secure Vichy territories in Morocco, Algeria and Tunisia to enable them spread their influence over the Western Desert. In this sense, the Mediterranean would be free to all Allies to ship goods through Cape of Good Hope. On November 8, 1942, the Allies, due to fear made a quick attempt to take over Tunisia. They were certain the Axis would be rivals if they heard of the Torch landings. The Operation Torch landing and the frequent battles, which were against the Vichy forces made it easy for the Allies to get hold of the Axis forces and forcing them to surrender. This kind of battle happened in Tunisia the same period when North African Campaign took place. it was a battle dominated by the German and Italian forces which made use of weapons like the German Tiger which was among the 501 heavy tanks to be used in this battles. However, its success drew most of the support from the Allies who had a large soldier force and advanced weaponry. Alternatively, it referred to as the Desert war. It was the first campaign to occur and thus gave birth to the North Africa Campaign. This campaign drew its strength from the massive supply of both weaponry, soldiers and food. The Allies used this as a chance to capture the Axis thus making the Germans desperate. For instance, Erwin Rommel, a German commander had a rough time since all the fuel and other support links were disconnected. By the beginning of 1942, the U.S. Air Force Army had began building bombers and fighters just to support the campaign which it later referred to

Royal College of Pupils - Pass and Compare Royal College of Pupils Papers

Royal College of Pupils - Pass and Compare Royal College of Pupils PapersRoyal College of Pupils (RCP) is at the bottom of the ladder when it comes to overall performance in terms of pass rates, A* to G grades and other such records. This cannot be construed as a fluke; RCP has always been one of the lowest-performing institutions in the UK. We have always given our top students some kind of compensation, either monetary or academic - even in the case of their tuition fees. This year, we have decided to give the same kind of compensation to all students of A* to G standard when it comes to their performance on the higher level Royal College of Pupils (RCP) course papers.This means that if you want to succeed in any of the subjects at RCP, it is important that you pass the qualifying tests for your subjects. The main criterion for testing grades is that they should stand up to the standards set by the Ministry of Education, which has instructed all subjects to make sure that GCSE and A levels students are not just passing the exams but also demonstrating good marks. To illustrate the importance of this, there are no grades at all given to RCP students, not even marks for research papers.Even though RCP is the lowest performing institution in the UK, most people still believe that the staff is also at fault when it comes to student grading, mainly because most of them are Indian or Pakistani. In some cases, there have been allegations made about possible cheating and faking of results in the past. But none of these have been substantiated and we are happy to say that none of these has occurred recently.The RCPA, which sets the standards for teachers and GCSE teachers, has taken some steps to improve the teaching standards at RCPS. Many people feel that this has more to do with the fact that we now have tenured and successful teachers and thus encourage good teaching rather than being overly concerned with passing GCSEs.Now, however, the RCPA has decided to award grades for every subject to all students who have passed the grade 11 level of the British General Certificate of Secondary Education (GCSE). So, if you have passed the GCSE, you have to demonstrate good marks in the syllabus paper. This is the same situation that existed last year, but after some feedback from the feedback site, RCPA have made it easier to achieve grades for grades and so it's not really difficult.Before you submit your exam, you need to go through the guidelines provided by RCPA in order to ensure that your test will be legal and fair. RCPA also allows for second assessments. You can choose which you would like to do and what you would like to compare.If you don't know what grades mean or know the answer to any of the questions, you can go online to see the exam papers. If you want to get the passing grade, make sure that you study thoroughly and don't worry about what your friends think!

The Battle Over Writing Essay Samples on Hitchhickers Guide to the Galaxy and How to Win It

The Battle Over Writing Essay Samples on Hitchhickers Guide to the Galaxy and How to Win It The One Thing to Do for Writing Essay Samples on Hitchhickers Guide to the Galaxy Charles Kuralt You got to be cautious if you don't understand where you're going, as you may not get there. Either way, you're most likely to find something out of every one of them. Advanced Towels As everyone understands, the towel has become the most useful thing a man or woman can own. A standard name for a standard man. The game contains 100 puzzles, every one of which is a grid of numbers that has to be connected to sum 42. In addition, if you bring Quiet along, she's going to devote the first two or three minutes shooting all the puppets dead. To awaken quite alone in a strange town is among the pleasantest sensations on earth. Embarrassed by her provocative comments before my pals. That it is a premium within this situation is just a bonus. The very first impression is so crucial. Some deep-rooted portion of you'd know you were loved. The consumers are certain to get a material of a prime quality, together with cheap price levels. Choosing Good Writing Essay Samples on Hitchhickers Guide to the Galaxy It's the traveller only who's foreign. We reside in a terrific world that's full of beauty, charm and adventure. A hunter who cherishes all the charms of her or his surroundings cannot fail, even should a trophy isn't found. This is one particular baseball fans young and old will rather not miss. The arts aren't a way to produce a living. Quite simply, it was very like a church services. The intention of this course is to supply the participants with best practices including tools, techniques and a simple roadmap to construct capabilities in the usage of social networking technologies in their very own emergency management organizations (State, local, Tr ibal) as a way to further their emergency response missions. You can select to locate examples which deal with government, bureaucracy or a different facet of society. This might also be viewed in the current society on how folks elect someone for certain personal reasons, simply to resent them later once they do not hold true to their promises. Perhaps among the most normal people that you could ever know is now the last human alive. So I want to start 2016 by looking back and share a number of the very best advice on this issue from those who have walked this earth over the previous hundreds and thousands of years. Concerning the restaurant itself, it has an establishment where folks watch the conclusion of everything'. If audiences enjoyed the very first then this is going to be an all vital read. On the other hand, the novel is totally based in the world of absurdity, indeed the characters spend their time looking for reason and meaning. This literary device is ordinarily used in order to give a narrative in the sort of the character's thoughts rather than using dialogue or description. At first, the dolphin sequence at the start of the film may seem to be absurdity, but additionally, there are elements of parody and satire that are worth examining. This movie might be a terrific conversation starter for families. It's a lovely thought. The solution is deliberately erroneous. All the perfect answers in the universe is going to do no good if the ideal questions aren't asked to start with. You'll have created something. You're not required to, but remember that it might provide help. All you must know for the moment is that the universe is much more complicated than you may think, even in the event you start from a position of thinking it's pretty damn complicated in the very first spot. I believe the most significant issue is to be in a great mood and relish life, wherever you're. They're a really human way of creating life more bearable. Later you come to find out they did not even should blow up the earth since they found an alternate method of traveling the universe. Man can't discover new oceans unless he's got the courage to get rid of sight of the shore. You see what a very small place you occupy on earth.

Outrageous Colorado College 2019-20 Application Essay Tips

Outrageous Colorado College 2019-20 Application Essay Tips What Is So Fascinating About Colorado College 2019-20 Application Essay? No matter how you are going to wind up submitting your essay, you should draft it into a word processor. You could use an elongated analogy, where each paragraph is a portion of the analogy. Define the expression bond paper. Most schools also permit you to send in a paper program, which theoretically offers you increased control over your essay formatting. The objective of the business alone makes this one of the greatest essay services. If you wish to find high high quality research and thesis papers punctually and for a fair price, you should probably attempt using EssaySupply.com. The Appeal of Colorado College 2019-20 Application Essay Before you commence writing your college essay, you might want to see the essay examplesA that we've listed for you, so that you may have more idea on what things to put in the college essay you will create. 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Meanwhile, you might considervisiting Colorado College's campusto take a look at the campus and find some inspiratio n. If you're thinking about attending Delta College, be certain to check back here often for more information. Work with your students to assist them with this important part of their application. Art supplements will be contained in a student's application for consideration as a portion of our holistic review practice. Along with just science, I'm drawn to State University for different factors. Thus, State University isn't only the ideal location for me, it is the sole location for me. On top of its growing cultural and ethnic diversity, it is becoming a master at creating a niche for every student.

Genetically modified organism - DNA Essay Example for Free

Genetically modified organism DNA Essay 1. Introduction Genetically modified foods are foods derived from genetically modified organisms (GMOS). GMOS have had particular turns led to their DNA by genetic engineering techniques. In fact,GM foods are already becoming a part of our life. (Maessen, 1997) The 2010 estimate, the most recent, says that 925 million people were undernourished in 2010 (FAO 2010). There are clearly some very real issues that need to be resolved. The purpose of this paper is to discuss whether GM foods can solve the problem of world hungry . It covers two advantages of GM food which are increasing production and effects of environment protection,finally it will cover a disadvantage for human health. 2 . Advantages 2. 1 Increase in food production GM food should be consider as a solution to slove world hunger as it produces much higher yield than conventional crops. Firstly,Crops are genetically modified in order to make them pest-resistant, drought-resistant, higher yield per acre, faster maturing, or some other improvement over natural crops. They are likely to be safer than ordinary crops since they dont have chemical pesticide on them , they are more likely to be picked and sent to market at their peak of ripeness, and are likely to last longer once you have them home in refrigerators. Its helping to resolve the worlds hungry problem. 2. 2 Advantages for environment protection One effect of GM foods is to protect environment. Genes could also be manipulated in trees, for example to absorb more CO2 and reduce the threat of global warming. Genetic Engineering could increase genetic diversity, and produce more variant alleles which could also be crossed over and implanted into other species. (Friends of Earth,2003) 3. Disadvantages of GM foods potential negative human health There are also critics objected to potential negative human health. As it has a Genetic engineering may actually counteract the processes of nature by reducing the resistance of the species to environmental extremes and diseases by creating ideal traits. Furthermore, new viruses would be encouraged to mutate into more dangerous, virulent forms that would be unstoppable. Even more horrifying is the possibility that genetically engineered products have the capability of being toxic and threatening to human and animal health. (Royal Society. 2002)Some scientists believe that introducing genetically modified genes may have an irreversible effect with consequences yet unknown. (Food Standards Agency. 2002. ) 4. Conclusion In conclusion,this paper discussed the effects of GM foods. Therefore, according to these passage that the genetically modified technology can bring more advantage and less disadvantage to us. It becomes a tendency to eat genetically modified foods. So we just be at ease to eat unless the productions are counterfeit and inferior and it is not qualified by the standard department and the GM foods almost can solve food crisis. Words (428). References 1) Maessen, GDF. 1997. Genomic stability and stability of expression in genetically modified plants. Acta Botanica Neerlandica 46 3-24 2) Department of Environment, Transport and the Regions. 1999. News Release 107, 5 November 1999. 3) Schmidt, T and Heslop-Harrison, JS. 1998. Genomes, genes and junk: the large scale organization of plant chromosomes. Trends on Plant Science 3 195-9 4) Royal Society.2002. Genetically modified plants for food use and human health – an update 5) Dr Marion Healy. 2005. Food Standards Australia New Zealand. 2005. Retrieved June, 2005 from http://www. foodstandards. gov. au/_srcfiles/GM%20Foods_text_pp_final. pdf 6)Genetically Modified crops and food ,Friends of Earth,(2003). Retrieved January ,2003 from http://www. foe. co. uk/resource/briefings/gm_crops_food. pdf 7) Food Standards Agency. 2002. GO10008 Evaluating the risks associated with using GMOs in Human foods. Retrieved from http://www. foodstandards. gov. uk/science/sciencetopics/gmfoods/gm_reports.