Investigating the strength of Electrolytic solutions Essay Example for Free

Investigating the strength of Electrolytic solutions Essay Table 1 above shows the raw data of experiment I did to test the strength different electrolytic solutions. Moreover, this data table shows that all solutions except tap water and distilled water have the concentration of 0.5 M. In this table, some solutions’ ammeter reading has different uncertainty and multimeter setting. This is because solution like hydrochloric acid has high amp, so I had to set multimeter setting at 300mA in order to measure the ammeter reading of hydrochloric acid accurately. On the other hand, solution like distilled water has extremely low amp, so I had to set multimeter setting at 0. 3mA in order to measure the ammeter reading of distilled water accurately. Hence, varying in uncertainty of reading in each solution because as 1 reading, for example, if measured at setting of 300mA, is 5 amp per reading but if measured at 0.3mA, it is read as 0.005 amp per reading. 2.1. Data Processing Neutral Table 2 is a processed data of experiment on investigation of the strength of different electrolytic solutions. I included average of the data about strength of each electrolytic solution to make the data table clearer. Furthermore, I also included standard deviation of the data, to summarize the spread of values around the mean. Lastly, I added additional information about these solutions, whether if they are acidic, basic or neutral solutions. 3.1 Conclusion and Evaluation 3.1.1. Conclusion: To conclude, the background information that was given to me by the instructor states that stronger acidic or basic solutions are stronger electrolytes than those of weaker acidic, basic or neutral solutions. Referring to Table 2, which is a processed data of acquired data from this experiment, it provides the information of solutions whether if they are acidic, basic or neutral. In addition, it shows that stronger acid and base tend to have higher ammeter reading and weaker acid and base or neutral solutions tend to have lower ammeter reading. For example, hydrochloric acid, which is a strong acid, transferred mean reading of 47amp, whereas acetic acid, which is a weak acid, transferred mean reading of 0.92amp. Therefore, the results I got through experiment yield to the background information given by the instructor. (NakanishMasaki) 3.1.2. Evaluation: Everytime I finished experimenting with one solution three times, I thoroughly washed plastic container and 2 carbon electrodes with tap water, which made direct contact with the solution while testing, and dried them with paper towel. The purpose is to avoid errors in results by preventing mix of preexisting solutions with another kind of solution. Moreover, since the fluctuation of the value that multimeter presented made hard for me to decide what to write as the data, whenever I fully connect complete electrical circuit, I waited for 15 seconds for the fluctuations to ease down. Finally, when I was performing experiment on calcium hydroxide (Picture 1), I mixed it by stirring with the glass pipe in order to uniformly spread the substance that was deposited on the bottom of the solution, so I can get uniformly mixed calcium hydroxide. I did my best to cover up the weaknesses of lab equipment, but there still are some weaknesses still which were present throughout the lab, and it might have varied the data I collected. First of all, in order to follow the written instruction from the instruction sheets given, I had to wash equipments that made direct contact with the solution everytime I’m changing the solution that I will perform experiment upon with distilled water, but due to the lack of distilled water, I washed them with tap water instead. Second of all, I am not sure if 15 seconds were enough time for the fluctuations of the value to settle, or maybe it was too much time. Last of all, whenever I finish mixing the calcium hydroxide, I have to transfer the solution to the smaller beaker for measurement, but it takes time to do that and the substance might have been settled down within the calcium hydroxide solution. Therefore, there were some errors that prevented me from collecting the best results. Improvements can be made by providing each candidate, like me, with better lab equipments such as more advanced multimeter. Also, enough distilled water so I can wash equipments with it to follow the original instructions given. Works Cited 1. http://www.chemguide.co.uk/physical/acidbaseeqia/bases.html 2. http://pubs.acs.org/doi/abs/10.1021/ac60144a032 3. http://goto.glocalnet.net/ibweb/homepagelink.htm

A Revolution of Values: The Promise of Multicultural Essay -- Rhetoric

A Revolution of Values: The Promise of Multicultural Change Bell Hooks was born in Hopkinsville, Kentucky in 1952. She was born into the era of segregation and was in high school during the start of civil rights movements. Since Hook’s was a young African American that attended one of the first integrated high schools, she experienced racism and segregation first hand. Her writing explains how it was to live during these times and also exhibits how her experiences effected her emotionally. Hook’s essay successfully achieves her purpose because of the credibility instilled by the historical context of her writing and expert opinions and her appeals to pathos through the use of personal experience. In Hook’s writing she had one specific purpose. She wanted to help people understand the depth and complexities of racial injustice. She is also informing the reader that racism is something that not many people think too much about. She is stating that we tend to overlook most of our past and present issues of racism and segregation because we have been raised in a world that is not an issue worth worrying about. She writes how hard it is to be a nation that has no multicultural injustices, and that her dream is to one day live a life where everyone can practice freedom. Hooks’ writing gains credibility from her use of historical context and expert opinions. One of the biggest factors is that she was from the south where white people thought of blacks as Bohemians that had radical ideas of becoming a nation of multicultural equality. The examples of these thoughts is valid because she was a young black girl at the time and witnessed it first hand. In the 1950’s through early 1960’s segregation was at its peak measure so... ...ndship. As you can see Bell Hooks’ purpose is successfully supported by credibility justified through the historical context of her writing and expert opinions, and her appeals to pathos through personal experience. Her purpose helps you see behind the lines and understand the complexities of racism. Knowing the historical context of her writing establishes her credibility and helps you understand the author’s situation. Last, her appeal to pathos is aided by personal experiences in which she wrote, helping give more meaning and support to her writing because it makes it easier to understand the point that she is trying to get across. So the next time that you are encountered with racism or see it, maybe you will think of Bell Hooks and help make this country a great place to live with freedom and the right of every individual to be equal.

Food inc review

Food Inc Extra Credit Food Inc is a documentary about the state of the food industry within the United States. It was a very in depth look at the farming industry that most people don't get a chance to see. Most people don't really think about where the food comes from or how it was farmed. This documentary gave a clear insight into how our food is really produced. When you think of farming, you may think of an area of land which is devoted primarily to the practice of producing and managing food, but in this ocumentary we learned that most of our food is actually produced in mega factories.Since there is such a high demand for processed food these days, farmers are artificially growing their crops. The film introduces us to an overcrowded chicken farm in Kentucky and clarifies the fact that chickens have doubled in size since the 1950's. Chickens today are genetically modified to have larger breasts in order to respond to the demands of the consumer's preference for white meat. The chickens row at such a rate that their bones and organs can't keep up with the rapid weight gain.The chickens aren't able to walk around since their legs cannot carry the weight. Health and safety regulations of the food, the animals, the workers on the assembly lines, and of the consumers who will be eating the food is often overlooked by the companies in an effort to provide cheap food regardless of the negative consequences. Animals at factory farms stand ankle deep in their manure for long eriods of time meaning that if one cow has E.Coli, the other animals can easily be infected with it which will then be passed on to the consumer when ingested. Overall, I believe that this documentary was a major eye opener for me to pay more attention to the type of food that I consume and to also take the proper precautions when preparing food at home. I have learnt the importance of properly reading food labels prior to purchasing food in order to be fully aware of what I am putting into my body.

Did Hitler Snub Jesse Owens at the Berlin Olympics

When he was competing, Ohio State track star  James  (â€Å"J.C.†Ã‚  Jesse)  Cleveland Owens  (1913-1980) was as famous and admired as Carl Lewis, Tiger Woods, or Michael Jordan are today. (1996 Olympic champ Carl Lewis has been called the â€Å"second Jesse Owens.†) Despite Jesse Owens athletic prowess, he faced racial discrimination when he returned to the US. But did this discrimination in his native land extend to his experience in Germany? The US and the 1936 Berlin Olympics Jesse Owens triumphed in Berlin, winning gold medals in the 100-meter, 200-meter, and  400-meter relays, as well as in the long jump. The  fact that American athletes competed in the 1936 Olympics at all is still considered by many to be a blotch on the history of the U.S. Olympic Committee. Germanys open discrimination against Jews and other â€Å"non-Aryans† was already public knowledge when many Americans opposed U.S. participation in the â€Å"Nazi Olympics.† Opponents to U.S. participation included the American ambassadors to Germany and Austria. But those who warned that Hitler and the Nazis would use the 1936 Olympic Games in Berlin for propaganda purposes lost the battle to have the U.S. boycott the Berlin  Olympiade. Myths and Truth: Jesse Owens in German Hitler did shun a black American athlete at the 1936 Games. On the first day of the Olympics, just before Cornelius Johnson, an  African-American  athlete  who won the first gold medal for the U.S. that day, was to receive his award, Hitler left the stadium early. (The Nazis later claimed it was a previously scheduled departure.) Prior to his departure, Hitler had received a number of winners, but Olympic officials informed the German leader that in the future he must receive all of the winners or none at all. After the first day, he opted to acknowledge none. Jesse Owens had his victories on the second day, when Hitler was no longer in attendance. Would Hitler have snubbed Owens had he been in the stadium on day two? Perhaps. But since he wasnt there, we can only surmise. Which brings us to another Olympic myth. It is often stated that Jesse Owens four gold medals humiliated Hitler by proving to the world that Nazi claims of Aryan superiority were a lie. But Hitler and the Nazis were far from unhappy with the Olympic results. Not only did Germany win far more medals than any other country at the 1936 Olympics, but the Nazis had pulled off the huge public relations coup that Olympic opponents had predicted, casting Germany and the Nazis in a positive light. In the long run, Owens victories turned out to be only a minor embarrassment for Nazi Germany. In fact, Jesse Owens reception by the German public and the spectators in the Olympic stadium was warm. There were German cheers of â€Å"Yesseh Oh-vens† or just â€Å"Oh-vens† from the crowd. Owens was a true celebrity in Berlin, mobbed by autograph seekers to the point that he complained about all the attention. He later claimed that his reception in Berlin was greater than any other he had ever experienced, and he was quite popular even before the Olympics. â€Å"Hitler didnt snub me—it was [FDR] who snubbed me. The president didnt even send me a telegram.† ~Jesse Owens, quoted in  Triumph, a book about the 1936 Olympics by Jeremy Schaap. After the Olympics: Owens and Franklin D. Roosevelt Ironically, the real snubs of Owens came from his own president and his own country. Even after ticker-tape parades for Owens in New York City and Cleveland, President Franklin D. Roosevelt never publicly acknowledged Owens achievements. Owens was never invited to the White House and never even received a letter of congratulations from the president. Almost two decades passed before another American president, Dwight D. Eisenhower, honored Owens by naming him â€Å"Ambassador of Sports† — in 1955. Racial discrimination prevented Jesse Owens from enjoying anything close to the huge financial benefits that athletes can expect today. When Owens came home from his success in Nazi Germany, he received no Hollywood offers, no endorsement contracts, and no ad deals. His face didnt appear on cereal boxes. Three years after his victories in Berlin, a failed business deal forced Owens to declare bankruptcy. He made a modest living from his own sports promotions, including racing against a thoroughbred horse. After moving to Chicago in 1949, he started a successful public relations firm. Owens was also a popular jazz disc jockey for many years in Chicago. Some True Jesse Owens Stories In Berlin, Owens competed wearing track shoes made by the  Gebrà ¼der Dassler Schuhfabrik, a German company. The Dassler brothers later split into two firms, known as  Adidas  and Puma.In 1984, the Berlin street known as  Stadionallee  (Stadium boulevard), south of the Olympic stadium in Charlottenburg-Wilmersdorf, was renamed  Jesse-Owens-Allee. Owens widow Ruth and his three daughters attended the dedication ceremonies on March 10 as guests of the German government. A memorial plaque for Owens is also located at the  Olympiastadion.The Jesse-Owens-Realschule/Oberschule (secondary school) is in Berlin-Lichtenberg.Despite his stardom, Owens received no scholarship money from Ohio State University. He had to work as an elevator operator, waiter, and gas station attendant to support himself and his wife.Two U.S.  postage stamps  have been issued to honor Owens, one in 1990 and another in 1998.Jesse Owens was born in Danville, Alabama on Sept. 12, 1913. His family mov ed to Cleveland when he was nine. In 1949 the Owens settled in Chicago. His grave is in Chicagos Oak Woods Cemetery.Owens became a heavy smoker following his athletic days. He died of lung cancer in Phoenix, Arizona on March 31, 1980.