Rates of reaction - concentration Essay Example for Free

Rates of reaction concentration Essay This experiment tests how differing concentrations affect the rate of a chemical reaction. It will be done using a simple experiment where one substance is constant and the other is varying. Apparatus For each experiment I will need the following; 150 cm3 2 Molar hydrochloric acid 140 cm3 water 250 cm3 sodium thiosulphate 1 conical flask 1 measuring cylinder 1 stop clock 5 pieces of paper 1 pen Preliminary Work; Prior to this investigation, I conducted a preliminary experiment to determine the strength of my method in terms of accuracy and precision. I decided to test how the temperature of an experiment affects the rate of reaction. Therefore, I got 50 cm3 sodium thiosulphate and 40cm3 hydrochloric acid diluted with 10cm3 water. After pouring the two mixtures into a conical flask I placed it onto a black cross on a piece of paper and timed the time it took for the precipitate of sulphur produced to make the solution seem so cloudy the cross disappeared. The same experiment was conducted at temperature of 10Â °C, 20Â °C, 30Â °C, 40Â °C and 50Â °C. The two substances that I have chosen for preliminary work will give me an accurate indication of the time taken for the reaction to occur in the actual investigation, as unlike with most experiments, the chemicals produce the precipitate of sulphur which turns the solution a milky yellow colour which is easy to see clearly. From my previous work, I can see that the range of temperatures was enough to give a clear summary of the investigation; therefore, I am transferring the range of temperature to use as amounts of hydrochloric acid as I feel it gives reliable results. Method After retrieving all the apparatus that is needed to successfully complete the experiment, I will begin with drawing a large cross onto the piece of paper. Then I will measure out five different quantities of both water and hydrochloric acid using a measuring cylinder in the following Display complete essay The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

Philip Roth- Master of the Double Identity :: essays research papers fc

Philip Roth - Master of the â€Å"Double Identity† because he suffers from one What influences one's identity? Is it their homes, their parents, their religion, or maybe where they live? When do they get one? Do they get it when they understand right from wrong, or when they can read, or are they born with it? Everyone has one and each identity is unique, or is it? In literature, (or life) religion plays a large role in a character's identity. However, sometimes the writer's own religion and personal experiences shapes the character's identity more than his/her imagination does. A person's religion can play a big role in one's identity. Throughout his works, Philip Roth explores the theme of identity doubles. Roth's portrayal of identity formation in his characters is directly inspired by his own identity; his life. One of the most obvious examples of Roth's art imitating life is in two of his books naming the main characters after none other than himself. It was among some of the many startling gestures in his career; in Deception (1990) he referred to the main character as Philip and in Operation Shylock (1993) he made reference to the main character as Philip Roth. In her article titled, â€Å"Philip Roth's Fictions of Self Exposure†, Debra Shostak remarks how odd it is for an author to outwardly make reference to themselves when most authors want avoid any personal association with their work other than writing it, she further points out that Roth intentionally writes this way, making his career out of his reader's inclinations toward â€Å"biographical interpretations†: Few writers dare to name themselves at the center of their inventions, which is why it is so arresting to find a work of fiction that pronounces its author's name within the text. Because readers are frequently tempted, from either prurient interest or more impartial motives, to discern autobiography in a fictional narrative, most writers of fiction seem to labor out of modesty , a sense of privacy, or a display of imaginative capacities to erase the traces of their own lives from their work. Not so Philip Roth. Especially since his invention of Nathan Zuckerman, Roth has encouraged readers to interpret the narrative voice of his fiction as a self-revealing "I," a Roth surrogate who, by the time of Deception and Operation Shylock, is no longer a surrogate but is "Roth" himself†¦ What I argue here is not that Roth is, strictly, writing autobiographically, but rather that he makes capital out of his readers' inclinations toward biographical interpretations of his work.

Frankenstien essay Essay

How does Mary Shelley present Frankenstein’s monster and what is her message to readers? In this essay I shall be answering the question on how Mary Shelley present Frankenstein’s monster and what is her message to readers? ‘ I will also explore the irrational fears that existed, about the progress of science and scientific technology, in the 1800s and how they are addressed in the novel. I will conclude with a personal comment on Shelley’s portrayal of the creature and scientific progress. ‘Frankenstein or the Modern Prometheus’ was written by Mary Shelley in the early 19th century. At that time it was very unusual for women to write and even more so because she was only 19 years of age. At this time there were many ambitious scientists. These new scientists were eager to research things they had not researched before. She first published the book anonymously in 1818 when critics hailed it as the work of a genius and were very much surprised when they found out that a woman had written it. This was also how initially reacted. Many scientific advances took place in the 18th and 19th centuries such as the invention of the lightning conductor, and the creation of the first prototype electric battery. In some ways, the creation of the creature by Frankenstein shows the dangers of humans trying to overreach their potential with scientific research and knowledge. Victor Frankenstein, an ambitious Swiss university student, dedicates his entire life to trying to create life. Nonetheless, when he succeeds, the ugliness and repulsiveness of the creature forces Frankenstein to reject it. The creature faces a life of solitude and loneliness and society rejects him even when it tries to help. This leads to the death of Frankenstein’s brother, William, whom the creature kills, and the servant, Justine, is hung after being found guilty of the crime. Frankenstein then incurs the wrath of the creature by making a mate for it and then destroying it. This leads to the death of Henry Clerval, his best friend, and Elizabeth, his wife. In the end both the creature and Frankenstein die. The death of so many people can be a way of showing that scientific advance is not always the best way to go and that it can be dangerous at times. Themes which are, explored in Frankenstein; are madness, dreams and nightmares. During Shelley’s time there was a fear of new technology because of the dread that machines would replace humans as workers; this would leave many of the peasants, and working class is out of a job. This led to riots and revolutions such as the Luddite riots of 1811, which saw machines smashed in violent reaction. This can be linked to riots and demonstrations today against abortion and test-tube babies that one sees in the media everyday. The novel begins with the expedition of an explorer named Walton. Walton is about to fulfill his ambition and go on his expedition to the North Pole. He wants to go to the North Pole because he wants to be remembered by discovering a place where ‘no man has ever gone’. Walton writes a letter to his sister from St. Petersburg. In his letter Walton says that he knows that ordinary people are worried about his ambitions. He says his sister regards it as an ‘evil forbidding’. Walton prepares for the expedition by being hard and very tough on himself as if he enjoys torturing himself. He states in the letter that he: â€Å"Endured cold, famine, thirst, and want of sleep† Victor Frankenstein wants to push back the boundaries of science. He wants to create life so that people would live longer. The reason he desires to bring back life is that no one else had accomplished this before. He is also a scientist and wants to be remembered like all scientists. Victor Frankenstein is also very excited because he not only thinks he can bring back life but he also thinks he could create life. He says: â€Å"A new species would bless me as its creator and source† He thinks he’s going to be thanked and thought of like a god by the new species he is about to create. Frankenstein prepares for this by attending lectures, reading books, not sleeping and putting himself wholly into his work: â€Å"Stars often disappeared into the light of the morning whilst I was yet engaged in my laboratory†, meaning that Frankenstein spent so much time in the laboratory the nights passed quickly. This also shows the devotion to his work. His work appears to be dangerous because he went to places like ‘charnel houses’ and ‘vaults’, which are considered to be very creepy. He spent days inside these places to collect ‘raw materials’, that is, body parts for his creation. This indicates that he is prepared to do anything to accomplish his ambition, to bring back life. When the creature is in the process of being created, Frankenstein is portrayed as a fanatic and maniac about what he is doing. He neglected his health due to his commitment to his work. I can discern this because he says: â€Å"My cheek had grown pale with study, and my person had become emaciated with confinement. † This tells me that he has become very ill because of his steadfastness on his mission to create artificial life. This can mean that he is too committed to reaching an objective that is out of any human’s reach. In a way Mary Shelley also shows how Frankenstein is breaking society’s taboos by: â€Å"[collecting] bones from charnel houses; and disturbing, with profane fingers, the tremendous secrets of the human frame. † This is shown as going against nature and as evil. He also describes his aim as filthy, with the use of the words: â€Å"†¦ my workshop of filthy creation†¦ â€Å"

The Legal Drinking Age At The United States Of America

Vinny Messina Professor Newell ENC 1102 03 May 2015 Time to Look at the Facts There have been many recent debates on the subject of the legal age to drink alcoholic beverages in the United States of America. Some otherwise intelligent people want to lower the legal drinking age to eighteen rather than keep it at twenty-one, the current federally mandated drinking age. In Time Magazine Mary Cary, author of Time to Lower the Drinking Age, puts forth the position that lowering the drinking age would actually be beneficial to society. Though lowering the drinking age to eighteen may lead to solutions to underage drinking, many other, more dangerous issues may arise from teenagers who begin to drink earlier in life; this is the greater matter that and it should not be overlooked on this issue. According to Mary Cary, lowering the drinking age would not increase drunk driving and the deaths associated with it. She believes that the issue of drunk driving has already been addressed and that the problem no longer exists. She states that, Th anks to MADD, drunken driving isn’t the problem it used to be, and she mentions that this is the case because, we now throw the book at drunken drivers in this country (Cary). While both of these issues may be true, she does not connect these two facts to lowering the drinking age. Lowering the drinking age may, in fact, increase the risk of drunk driving since alcohol will be more readily available to young people who have a reputationShow MoreRelatedEmily Blair . Ms.Kaba. Research Paper. 13 May 2017. The1124 Words   |  5 Pages13 May 2017 The Legal Drinking Age is Not Working A problem that is becoming very prevalent throughout the United States is underage drinking. Although the legal age of alcohol consumption is twenty one, alcohol abuse still remains a significant problem with American youth. Almost all alcohol consumption by teenagers is done through binge drinking. In America the age of eighteen is when you are finally considered an â€Å"adult†. Although you are now considered an adult and have legal and social responsibilitiesRead MoreThe Minimum Drinking Age Act1700 Words   |  7 PagesNational Minimum Drinking Age Act made all 50 states raise the legal drinking age to 21(Dejong). The debate is on whether the age should be lowered or not. Statistically, having the age at 21 has been very helpful in keeping the nation safe. If there is not an issue with age now, would it make sense to lower the age and create unnecessary problems? In this case, the negative effects outweigh the positive. Simply because there is no good in lowering the age. The legal drinking age has been set atRead MoreUnderage Drinking At The United States916 Words   |  4 PagesAs an eighteen year old in America, you are able to sign housing contracts, join the military, marry a loved one, or even own a firearm but you cannot have a legal drink. We are allowing young American citizens to sign their life away to fight for our country yet if they are seen with a beer they will experience legal complications. Also, at the age of eighteen you are able to smoke and purchase cigarettes, why make drinking different? Underage drinking in America is inevitable. Bill H.R 734, EliminatingRead MoreThe Minimum Drinking Age Act1211 Words   |  5 Pages Some people find it hard to understand that at the age of eighteen you can fight and die for your country, but you cannot legally drink or purchase alcoholic beverages. Others find it hard to believe that there are people who want people under the age of twenty-one drinking. The important question is: should the drinking age be lowered to eighteen instead of remaining at twent y-one? The legal drinking age is the age at which a person can consume or purchase alcohol. These laws cover a wide rangeRead MoreAmerica s Legal Drinking Age Essay1195 Words   |  5 PagesEveryone knows that the United States’s drinking age is at 21, much higher than England’s drinking age. Many people believe that we cause way less destructions than the people of England, but that’s not true. We actually cause more accidents and destructions than they do. The United States’s death rate is actually ranked 39 out of 172 countries at 2.91 while England is ranked at 1.70 on a scale of death rate per 100,000. (ALCOHOL DEATH RATE BY COUNTRY. World Life Expectancy. N.p., n.d. Web. 23Read MorePositive And Negative Effects Of Drinking Alcohol1709 Words   |  7 Pagesthe consumption of alcohol but it can be said that drinking alcohol has both positive and negative effects. Controversy may arise between opposing sides that those below the age of twenty-one are not r esponsible enough to drink however are allowed a driving license or a driver’s permit. In the United States of America, society and lawmakers focus more on the negative impacts of alcohol consumption especially when it comes to who we allow drinking, and do not consider that teenagers are able to thinkRead MoreThe Legal Drinking Age For The United States Government Essay1196 Words   |  5 Pagesmultiple policies that should be taken into high consideration for the United States government. However, one specific topic that needs to be addressed is the legal drinking age. As of now, the legal drinking age in America is 21. To some residents, this law is considerably reasonable. To others, having the drinking age of 21 seems unnecessary for multiple reasons. Most people would agree that having the current drinking age allows for more responsible teens and young adults. Yet in most cases, thisRead MoreThe Legal Drinking Age Should Be Lowered955 Words   |  4 PagesIn the Unit ed States of America, the National Government requires the states to enforce a legal drinking age of twenty-one. Where as the world average drinking age is eighteen, and in some Countries it is even lower where it is possible to get a beer at sixteen years of age. Taking that into consideration, there is a great deal of controversy in the United States on what the legal age should be to purchase and consume an alcoholic beverage. The largest issue being that you are considered to be anRead MoreLowering The Drinking Legal Age872 Words   |  4 Pageshas its limit age that allows people to drink Alcoholic beverage. In the United States of America, most people are able to drink and purchase alcohol at the legal age of twenty-one. Unlike the United States, most countries around the world allow their citizen to drink alcohol under the age of 21. Many American wants the U.S. government to minimize the drinking legal (MLDA) from 21 to 18 so they will be similar to other countries around t he world that allowed people to drink at the age of 18. DavidRead MoreDrinking Culture and American Social Norms1318 Words   |  6 PagesSPEECH #3 – PERSUASIVE SPEECH Name: DANIEL C. DILIGENT Title: Lowering the Legal Drinking Age Specific Purpose: To argue in favor of lowering the minimum legal drinking age in the United States. Thesis Statement: I will discuss 1) the current legal drinking age, 2) the effect that this drinking age has upon American social norms, and 3) the potential benefits of a lower drinking age. I. INTRODUCTION A. Hook: Alcohol is ever-present in today’s American society. Television viewers are constantly bombarded