Research proposal Assignment & Resarch Essay Example | Topics and Well Written Essays - 2250 words - 1

Assignment & Resarch Essay - Research Proposal Example Captain Cook was eager to trade with the people of Nuu-chah-nulth. Word went out of his trade with the people of Nuu-chah-nulth and the profits that he made from the trade. As a result many European settlers moved to the Island bringing with them smallpox and other diseases that killed the Aboriginals; the indigenous people of the Island (Carty, 381). After the infestation and the effects of smallpox, the Island was not as busy in the beginning of the 19th century. However, there were still activities that shaped the present day British Columbia. Before the turn of the century, many Europeans settled in the Island. The Spanish considered the Island to be under its territory because of its explorations in the region in the 16th century. When the Spanish heard of the arrival of the British into the Island, they took their ships creating the Nootka crisis; a crisis that almost led to war between Spain and Britain. After the crisis, the Spanish left Nootka Sound settlement. The influence of the Spanish in the Island came to an end in 1795 after the Nootka Convention. After the Spanish, left British Columbia European explorer merchants begun to get interested in the Island. Most of these merchants were British explorers and traders. Some of the notable people during this period were Simon Fraser, David Thompson and Sir Alexander Macke nzie (Recksten, 280). The three Britons were employees of Northwest Company and were looking for a river route to the pacific. If found, this route was supposed to help their company expand its fur trade. The first to arrive was Mackenzie followed by Fraser; they were both unable to find routes that were fit for trade. It was David Thomson who finally found a route to the Pacific that would be appropriate for trade. During this period, explorers used to lay claim to trade routes that they had discovered. Despite having worked hard to find the route, David Thompson could not lay claim

Influence of Christianity on Literature

Influence of Christianity on Literature Introduction Christianity and Islam are daughter religions of Judaism. They were established as splinter groups from Judaism at different times in the history of the Jews. On its part, Judaism is a very old religion which traces its origin from the Old Testament times of Abraham and Moses. In fact, all of its doctrines revolve around the Mosaic Law. These are sets of rules/commandments which were given to Moses by God (Yahweh) in Mount Sinai. It happened at a time when he was called by God to go back to Egypt and deliver His people (the Israelites) from the yoke of oppression from the ruthless Pharaoh. This followed the enslavement of the Israelites that lasted for over 400 years until they were eventually delivered by Moses. Later, Judaism became the official religion amongst the Jews[1]. On the other hand, Christianity is a religion which is based on the teachings of Jesus Christ. As recorded in the Synoptic Gospels in the Holy Bible, Jesus was born of Virgin Mary and Joseph[2]. Despite growing in strict Jewish traditions, He later directly criticized the actions of the Pharisees, Scribes and Sadducees who had been imposing stringent laws on the people. Thus, He advocated for transition into a new order which later turned to be Christianity especially after His death. This came as a result of the efforts of the early apostles under the leadership of St. Peter. All these were done because of the teachings of Jesus Christ who had been appealing to His followers to accept to repent their sins and accept the good news[3]. The good news was about the promise of eternal life which would accrue to anyone who would accept Him as their personal savior. In other words, Christianity is a new religion which split from Judaism and is based on the teachings of Jesus Himself. This clearly demonstrates that it is a daughter religion of Judaism. After all, it also reveres the Old Testament as a holy book. To the Judaists, Old Testament is the most important holy book used in advancing their teachings and doctrines. Meanwhile, Islam is also another religion which is also believed to have split from Judaism. It was the last religion which traces its origin to Judaism. It was founded by Prophet Mohammed (Peace Be upon Him) who lived a lot of years after the death of Jesus Christ. Unlike the rest of the religions, Islam came into existence after the interactions of Prophet Mohamed (PBUH). Meaning, it borrowed a lot of doctrines from Judaism and Christianity which were already established at the time it was founded. According to Islamic historians, Prophet Mohamed (PBUH) was the last and most important prophet amongst the Muslims. To the Muslims, Quran is the only Holy Book which should be used in the worship of Allah (the only God to be worshipped). However, the Quran is often used along side the hadith which contains the speeches about Prophet Mohammed (PBUH). Why Christianity Dominates Literature As a matter of fact, Christianity, Islam and Judaism are some of the most prominent classical religions in the contemporary society[4]. According to the latest statistics, there are a total of 2.9 billion Christians in the world today. This is nearly a third of the world’s population. Meaning, it is the only religion with the highest number of followers globally. For Christianity to reach where it is today, it has actually had a very long history. This began at the time of Jesus who initially faced too much opposition from conservative Jewish sects such as the Pharisees. Because of their different world views, the Pharisees and the teachers of the law made it so hard to for Jesus to spread the gospel to His followers. Even after triumphantly defeating death, it was not easier for the early Church apostles to advance Jesus’ teachings and spread the good news to all the corners of the world as He had commanded them[5]. Thus, it means that Christianity has managed to dominate literary texts depicting its mother and sister religions due to the fact that it has had a lot of committed people who dedicated their life to serve humanity and make remarkable contributions to people’s lives. If it were not for their efforts, it might not be much easier for the authors, early church fathers, philosophers and theologians to write about. This might be attributed to the numerous extra-ordinary activities which they performed[6]. As already highlighted, amongst these people is Jesus Christ. It is a common knowledge to all Christians that Jesus is the most important figure in this religion. Had it not been for Him, Christianity would not have existed. This is because He managed to gather large multitudes and performed numerous miracles which many people, especially His critics could not believe. Therefore, because He had lots of stories to be written, several books have been published provide people with all these information. They are very important since they act as evidence for the great works that He did as He was battling the dominance of the Pharisees who had taken control of the Jewish community for a very long time. Unlike Jesus, these Pharisees were so conservative and had made life to be too challenging to the ordinary Jews who needed to be saved from such oppression. Right from His birth, Jesus Christ had a very complicated history. First, His birth had been prophesied by several prophets such as Jeremiah and Isaiah. God had planned that He would be born of a Virgin Mary (who still remained virgin even after His birth). Besides, His birth took place in the historical town of Bethlehem in a very unusual place[7]. Later, He made lots of contributions towards the development of Christianity. These include a series of sermons that He delivered in different laces which He traversed during His entire period of the ministry[8]. As a universal figure, He did not only concentrate in Israel, but even preached to the gentiles. This demonstrates that He had not only come for the Jews, but also for other people especially the sinners who needed to repent and accept to live according to the word of God. Therefore, these teachings are some of the most popular works which have been published by several scholars. In fact, the manner in which He exhaustively used the parables during His sermons made Him to be classified as the greatest and best teacher in the world. Everyone wanted to publish a book to record His works. A part from recoding the preaching of Jesus, many scholars have been interested in writing books about the miracles that He had performed. As already highlighted, Jesus Christ performed some of the greatest miracles in the history of man. Here, He cured the sick, fed the hungry and raised the dead. Each of these is of a great importance to His followers. They proved that He was actually concerned about the welfare of His followers especially the poor, malnourished and the less fortunate in the society. For instance, by curing the lepers and those possessed by demons, Jesus demonstrated that He could liberate individuals from their agonies. This was particularly seen when He cured those who had been sick and abandoned for several decades. Therefore, inmost of the writings, all these information is captured. This has been evidenced even in the literary works which discuss about Judaism, Christianity and Islam. A part from Jesus Christ, the other important figure amongst the Christians is Virgin Mary. Of course, Mother Mary is a revered figure amongst the Christians, Judaists and the Muslims. The stories of Mary have been extensively covered in several books[9]. This is because she is believed to be holding a very important position both in Christianity, Judaism and Islam. For the Judaists, Mary is the mother of Jesus. It is through her that the Jews got a messiah who had been promised to them since the time of Isaiah and Jeremiah. For a very long time, the Jewish society had been waiting for a messiah who was to come and save them from their oppressors. Thus, Mary plays a very integral role in Judaism. If it were not her, Jesus would not have been born. The same applies to the Muslims who also believe in Jesus. However, unlike Christians, they hold that Jesus was not God, but a prophet just like others like Mohamed, Isaiah and Obadiah. Therefore, Mary is also revered by them as she is accredited with the bearing of Jesus. On the other hand, Mary holds a central position in the church. To the Christians, it is Virgin Mary who gave birth to Jesus Christ, a messiah who had been promised to them by God. Therefore, by being the mother of Jesus, Mary is undoubtedly the mother of God. Thus, she is the mother of the church. For this reason, the information about Mother Mary has been disseminated by several writers. This is what has been evidenced in the stories such as The Tales of Count Lucanor and Miracles of Our Lady which are amongst the earliest books written to give accounts of some of the most memorable miracles performed by the Virgin Mary in the history of the Christian Church. In the Miracles of Our Lady, Gonzalo de Berceo gives a clear presentation about the miracles of Virgin Mary which she had performed to her followers. However, this is given from the perspective of Christianity. As it is recorded in the collections, Virgin Mary had used her powers as the mother of God to perform different types of miracles that she used to reward her faithful and obedient followers. At the same time, she performed some miracles in order to punish those who did not follow her ways, but opted to be subversive in their actions. Therefore, they had to be punished by Mary so as to act as examples and make them conduct themselves in line with Christian teachings. However, most of these teachings are highly held by the Christians. In Miracle Three: Cleric and the Flower, Virgin Mary performed a very extra-ordinary action which amazed everyone. It was an example of how she, as a Mother of the Church, could use her divine powers to perform miracles to demonstrate that it is a worthy thing for a person to live as per the word of God. In this miracle, there was a cleric who was a very righteous man of God. He always lived according to the teachings of the Bible. As a clergy, he was doing all the good things which are accepted by God. During that time, it was a tradition to accord Christians a decent burial. A person in his stature would be buried in a Christian cemetery which was specially designed to burry staunch followers like him. However, when he died, no one bothered to burry him as per the traditions. Instead, he was jealously buried in isolation. Based on his relationships with Mother Mary, she ordered that the man be buried in the designated Christian cemetery. Therefore, when he was to be exhumed, everyo ne was amazed to find out that the dead man was not rotten, but producing attractive and pleasant flowery smell. Hence, Mother Mary performed this miracle to reward the clergy for his dedicated services during his lifetime[10]. In miracle 16: The Little Jewish Boy, Mother Mary also performed a miracle which was classified as a reward for righteousness. In Bourges, there was a great division between the Jews and Christians. The members of the two religions were hostile to one another. In fact, this is similar to the situation that existed during the time of the early church in which the early church apostles were surprised by the Jews and Roman authorities. However, in this case, the little Jewish boy whose parents were strict Judaists got an opportunity to play with Christian and join them in a church service in which he saw, admired, liked and fell in love with the Mother Mary. Later, when he went back to his family and informed his father about it, he was infuriated. Therefore, he threw the boy into a raging fire. Surprisingly, the little boy was not harmed at all. When he came out, he attributed his escape to Mother Mary whom he had seen her image on the church wall. This miracle can also be used to just ify why Mother Mary is too popular amongst the Christians. Judaism, Christianity and Islam are related in many ways. A part from sharing similar history, they have a lot of common beliefs and doctrines. These include the belief in God and prominent historical figures such as Jesus and Mary[11]. Today, they still remain as the most popular classical religions in the society. However, Christianity still stands out very strongly. This is evidenced in the manner it dominates literary work in which all of these religions are included. This might be attributed to the fact that it has lots of significant people who constitute its long, turbulent and expansive history. For instance, in The Tales of Count Lucanor and Miracles of Our Lady, a lot of stories are presented about Virgin Mary who used her powers to perform lots of miracles to the Christian believers[12]. Even if Mary is accepted by all these religions, she holds a very important position in the Christian Church. In a publication like Miracles of Our Lady, it has to prominently feature about Christianity. It has to appeal most to the Christians because they are the ones who have placed Mother Mary in the highest status as compared to the Muslims and Judaists. To the Muslims, Jesus was not a central figure in the foundation of their religion. He was just a prophet like any other. Hence, it implies that Virgin Mary could be like an ordinary human being who gave birth to a prophet of Allah. Hence, she can not be more important than other mothers who gave birth to other prophets. Although slightly different, in Judaism, Virgin Mary was the mother of Jesus who came to liberate the Jews from their (political) oppression. He did not found their religion. However, this is much different from Christians who believe in Jesus as a messiah whose teachings should strictly complied with. Hence, Mother Mary becomes the mother of messiah who readily offered His life as a ransom to save humanity from their si ns. And because Jesus was God, Mother Mary obviously becomes the mother of God. Further more, since Jesus is embodied in the Church, Mother Mary too becomes the mother of the church[13]. This explains why she is still adored as the central focus of the church through whom the believers can receive blessings and salvation. She is more important to Christians than to any other religion. Bibliography Ackerman, Jane E., ‘The Theme of Mary’s Power in the Milagros de Nuestra Seà ±ora’, Journal of Hispanic Philology, 8 (1983-84), 17-31. Braudy, Leo, From Chivalry to Terrorism: War and the Changing Nature of Masculinity (New York: Vintage Books, 2005). Daas, Martha Mary, The Politics of Salvation: Gonzalo de Berceo’s Reinvention of the Marian Myth, Papers of the Medieval Hispanic Research Seminar 66 (London: Department of Iberian and Latin American Studies, Queen Mary, University of London, 2011). Duby, Georges, The Three Orders: Feudal Society Imagined (Chicago: University of Chicago Press, 1980). Flory, Jean, ‘Chivalry’, in Encyclopaedia of the Middle Ages (Oxford: Oxford University Press, 2001). Kelley, Mary Jane, ‘Spinning Virgin Yarns: Narrative, Miracles, and Salvation in Gonzalo de Berceo’s Milagros de Nuestra Seà ±ora’, Hispania (USA), 74 (1991), 814-23. Keen, Maurice, Chivalry, Yale Nota Bene (New Haven: Yale Unive rsity Press, 2005). Rubin, Miri, Mother of God: A History of the Virgin Mary (London: Allen Lane, 2009). Seidenspinner-Nà ºÃƒ ±ez, Dayle, ‘On ‘â€Å"Dios y el mundo†: Author and Reader Response in Juan Ruiz and Juan Manuel’, Romance Philology, 42 (1988-89),  251-66. Warner, Marina, Alone of All Her Sex: The Myth and Cult of the Virgin Mary (London: Weidenfeld Nicholson, 1976). [1] Kelley, Mary Jane, ‘Spinning Virgin Yarns: Narrative, Miracles, and Salvation in Gonzalo de Berceo’s Milagros de Nuestra Seà ±ora’, Hispania (USA), 74 (1991), 814-23. [2] Ackerman, Jane E., ‘The Theme of Mary’s Power in the Milagros de Nuestra Seà ±ora’, Journal of Hispanic Philology, 8 (1983-84), 17-31. [3] Braudy, Leo, From Chivalry to Terrorism: War and the Changing Nature of Masculinity (New York: Vintage Books, 2005). [4] Keen, Maurice, Chivalry, Yale Nota Bene (New Haven: Yale University Press, 2005). [5] Duby, Georges, The Three Orders: Feudal Society Imagined (Chicago: University of Chicago Press, 1980). [6] Warner, Marina, Alone of All Her Sex: The Myth and Cult of the Virgin Mary (London: Weidenfeld Nicholson, 1976). [7] Keen, Maurice, Chivalry, Yale Nota Bene (New Haven: Yale University Press, 2005). [8] Rubin, Miri, Mother of God: A History of the Virgin Mary (London: Allen Lane, 2009). [9] Seidenspinner-Nà ºÃƒ ±ez, Dayle, ‘On ‘â€Å"Dios y el mundo†: Author and Reader Response in Juan Ruiz and Juan Manuel’, Romance Philology, 42 (1988-89), 251-66. [10] Seidenspinner-Nà ºÃƒ ±ez, Dayle, ‘On ‘â€Å"Dios y el mundo†: Author and Reader Response in Juan Ruiz and Juan Manuel’, Romance Philology, 42 (1988-89), 251-66. [11] Seidenspinner-Nà ºÃƒ ±ez, Dayle, ‘On ‘â€Å"Dios y el mundo†: Author and Reader Response in Juan Ruiz and Juan Manuel’, Romance Philology, 42 (1988-89), 251-66. [12] Daas, Martha Mary, The Politics of Salvation: Gonzalo de Berceo’s Reinvention of the Marian Myth, Papers of the Medieval Hispanic Research Seminar 66 (London: Department of Iberian and Latin American Studies, Queen Mary, University of London, 2011). [13] Flory, Jean, and ‘Chivalry’, in Encyclopedia of the Middle Ages (Oxford: Oxford University Press, 2001).

America’s Insatiable Appetite for Cocaine Essay -- Exploratory Essays

America’s Insatiable Appetite for Cocaine Where does Coca-Cola get its name? Why was it created? In 1886, the Georgia pharmacist, John Pemberton, designed Coca-Cola as a headache remedy and a stimulant. The original beverage contained cocaine and was used both as an intoxicating beverage and a medically useful tonic. The effects of the drink helped make it popular. Only in the early twentieth century was the drug eliminated from the Coca-Cola recipe and replaced with increased amounts of caffeine.[1]   Cocaine has a long history which also involves the once condoned use for medicinal purposes in the 1890's to being one of the most widespread abused drug today. Cocaine was the first effective local anesthetic for use in minor surgery. Before being used in medicine, the Inca civilization of Peru confined the use of coca to the royal classes and priesthood because the leaves were considered a symbol of divinity, a gift bestowed by the sun god. They clearly appreciated its pharmacological effects: deflecting fatigue and hunger, enhancing endurance, and promoting a sense of happiness.[1] Other civilizations gave cocaine to their slaves and workers instead of food and rest. "There is ample evidence that Indians under the influence of coca can withstand exceptional hardships and perform heavy labor, without requiring proper nourishment during that time....[By] using coca the Indians are able to travel on foot for hundreds of hours and run faster than horses without showing signs of fatigu e."[11] What is cocaine? How does cocaine increase alertness and decrease one's appetite? It is all in the head, more accurately, in the brain.   Cocaine is derived from the coca plant Erythroxylon coca in a white crystalline alkaloid powder. ... .... 5. Holden, Constance. "Cocaine Shrinks Your Brain?" Science. 248: April 1990, p. 167. 6. Cowen, Ron. "Cocaine and the Nervous System." Science News. 137: April 1990, p. 238. 7. Mendelson, Jack H., M.d. et al. "Anterior, Adrenal, and Gonadal Hormones During Cocaine Withdrawal." The American Journal of Psychiatry. 145: September 1988, p. 1095. 8. Volkow, Nora D., M.D. et al. "Changes in Brain Glucose Metabolism in Cocaine Dependence and Withdrawal." The American Journal of Psychiatry. 148: May 1991, p. 621. 9. Satel, Sally L., M.D. et al. "Clinical Phenomenology and Neurobiology of Cocaine Abstinence: A Prospective Inpatient Study." The American Journal of Psychiatry. 148: December 1991. P. 1713. 10. Gawin, Frank H. "Cocaine Addiction: Psychology and Neurophysiology." Science. 251: March 1991. P. 1580. 11. Freud, Sigmund. "Uber Coca." July 1884.

Identification After Gender Essay

Time episode â€Å"Fionna and Cake† and reading â€Å"Berengier of the Long Ass,† the expectations of genders are exposed through the reversal of roles in both of these pieces. The characters in these stories clearly demonstrate the expectations that certain males and females must negotiate in order to expose the problems when there is labeling of certain genders. Judith Butler’s analysis of gender is that it is performative- meaning that nobody really is a gender from the start; after watching the video and reading the text for this exercise, t is clear that Fionna and The Knight expose the misconceptions of gender throughout societies today. In our society today there are certain notions that many people have about what are â€Å"right† and â€Å"wrong† for males and females to wear, think, and act. There are certain things that are expected out of males- a toughness about them, an attitude that declares them as â€Å"the man of the house†- that is unfairly labeled upon every male in our society. Females are expected to be the ones who constantly act â€Å"girly’ and let the males do everything involving manual labor- this is an unfair label that is placed upon every female in our society. The video that Judith Butler takes part in is an example of a certain female who does not believe in conforming with the problems of the rest of our society- taking a stand against the â€Å"normal ideas† of the public. Judith Baker’s ideas are expressed throughout â€Å"Fionna and Cake† and â€Å"Berengier of the Long Ass,† when Fionna , The Lady, and The Knight expose these misconceptions by swapping roles; The Lady and Fionna act as the males, while Prince Gumball and The Knight act as the females. The idea that Fionna and The Lady â€Å"act as the males† in these stories define the problem that our society has when it omes to the definition of males and females. There are certain expectations that must be fulfilled when it comes to being seen as a male or female, but in these two pieces (video and story), the main characters both reject the expectations, or try and fulfill them unsuccessfully. In the Adventure Time episode â€Å"Fionna and Cake† Fionna and Prince Gumball act as their opposite gender in many ways. Throughout â€Å"Fionna and Cake† Fionna refuses to completely fulfill these expectations that are placed among most females. Fionna goes through the majority of the video as a tomboy who would rather carry weapons in her person than make-up. However, by the end of the video she adapts to the â€Å"normal† expectations for females by dressing up in a dress and trying to flatter Prince Gumball. In order for Fionna to expose the expectations of certain genders, Fionna goes to the extreme limit when trying to act as a boy; for there is nothing more â€Å"manly’ for a human-being to do than to save someone’s life. Fionna saves Prince Gumball, which in turn creates a relationship between the two that was not there before. It becomes evident that there is a gender swap in this video when Fionna is the one who is catching Prince Gumball when he falls from the ceiling. o infatuate Fionna, portraying the inner-man of Princess Ice, and getting the inner- woman out of Fionna. Fionna Justifies the ideas of Judith Butler’s by showing the audience that it took awhile for her to find her preferred gender- switching preferences multiple times between the beginning and end of the video. Fionna proves that any female can be happy doing â€Å"male-type† things, but also can be happy with a man, which goes against the norm of being a â€Å"tom boy. † By the end of the story it is clear that Fionna chooses to give up the â€Å"girly’ personality that is expected mong women, while consistently being herself, and attracting the Prince of her dreams. In the reading â€Å"Berengier of the Long Ass,† The Knight and his Lady successfully pull off an epic gender swap that The Knight would not be very proud of. Throughout the beginning of the story the Lady constantly criticizes her husband for being lazy and not being a â€Å"chivalrous† Knight. Because she questions the Knight’s manhood, the Knight forces himself to make a change. The Knight then tries to fulfill the expectations of Knights in our society by creating fake battles in the forests to impress his wife. Because he does a bad Job of faking his fatigue and injuries after these fake battles, the wife begins to catch on to his tricks. The wife then follows him to the next â€Å"battle† realizing that what he was saying the whole entire time was a fraud. Butler’s applications to gender being performative comes into play here, because the Knight tries so hard to be a â€Å"man† -that his life turns upside down because of it. The Knight’s wife then brings back another guy to the house, knowing that because her husband is a â€Å"woman† in her eyes, he will not even think about doing anything to harm her. When the Knight realizes that his attempt at conforming to the public’s interpretation ofa knight has failed, he feels as though he is a failure- for the only important in most knights’ life is the chivalrous way in which they live. A Knight’s expectation is to be the most brave, genuine, and honest guy of all; however, in this case the knight’s wife was more of a knight than he was. The Knight in this story tried to adapt to the expectations that are naturally placed on him, and instead of adapting he completely failed at his attempt. Most people are better off being their atural-selves than trying to fulfill the expectations that others place on them. After analyzing Fionna, Prince Gumball, The Knight, and his wife, it is obvious that being yourself leads to the most happiness between one and their partner. Fionna maintains her inner-boy personality and ends up being the happiest girl in the world. The Knight tries to change his personality and ends up watching his wife hang out with another man. Judith Butler’s ideas really make sense after analyzing these characters because of the way in which characters can reject the expectations of their gender and be completely happy because of it.

Complexometric Determination of Water Hardness Essay

The water hardness for unknown water sample number 40 was determined. From the results of the two complexometric titrations, the water hardness of the unknown sample was calculated to be 250.9 ppm CaCO3, which agrees with the ranges of acceptable water hardness in the city of Phoenix and Tempe Arizona. Introduction When rainfall picks up impurities from the soil, ions of sodium, magnesium, calcium, iron, and other metals are dissolved into the water. These impurities are what cause residues left on glassware from the reaction with the soap used for cleaning. Water hardness is from the metal ions with a +2 charge or higher being dissolved into the rainfall. When reporting water hardness, it is reported in units of mg CaCo3/L of solution, or in ppm due to one mg of solute having one millionth of the mass of a liter of water or dilute aqueous solution. It is reported using only CaCo3 because typically, Calcium is the largest contributor to the water hardness. The purpose of this experiment was to determine the concentration of metal ion impurities in an unknown sample of hard water by performing a complexometric titration with EDTA. The results were then compared to the expected range for municipal water hardness from multiple city websites. Methods All procedures from the CHM 152 Lab, Complexometric Determination of Water Hardness (1) were followed precisely. Unknown water sample #40 was mixed with approximately 20 ml of DI water, 3.0 ml of Ammonia/Ammonium Chloride (NH(aq) Buffer pH=10), and 4 drops of Eriochrome Black T indicator solution. It was then titrated with .004197 M EDTA, which was also made in the lab from 0.7582 g of , added to 500 mL of DI water, that was then standardized with a stock Calcium Ion Solution (CaCO(aq) 1.00g/1.00L) by titration. A total of 3 titration trials were completed to find the average molarity of the EDTA, and the average water hardness of unknown water sample #40. All mass measurements were taken from a AND Balance, serial number 12321601 and all titrations were done using a KIMAX buret, #173. Pipet measurements were taken from a 25mL Bel-Art, and 15mL Bel-Art pipet. The numerical techniques used in this experiment were, stoichiometry with mole ratio for calculating the molarity of the EDTA solution and water hardness and relative average absolute deviation in ppt to show how closely the results from the Standardized EDTA titration of each trial agree with each other. Data Analysis Based on the experiment and calculations, the average calculated concentration of metal ion impurities (water hardness) in unknown sample number 40 from this experiment was 250.9 ppm. From table 1, the average molarity of the titrated was calculated to be 0.004197 M. Table 1 The molarity of the EDTA solution for each trial n was calculated as follows: .0.01000 L CaCO3 SolnTotal EDTA Delivered LÃâ€"1.000 g CaCO31 L CaCO3 SolnÃâ€"1 mol CaCO3100.1 g CaCO3Ãâ€"1 mol Na2EDTA1 mol CaCO3=Molarity of Trial n The Average Molarity of the EDTA solution was calculated as follows: Average Molarity of EDTA Solution =Calculated molarity from each trialNumber of titration trials To determine how closely the results of each trial from the Standard Disodium EDTA titration (Table 1) agreed with each other, a relative average absolute deviation calculation was done. It was calculated as follows: Absolute deviation for trial n= Na2EDTA avg molarity-Total Na2EDTA Trial n absolute deviations3Na2EDTA avg molarityÃâ€"1000=Estimated Prescision (ppt) The results of the above calculation came out to be 14.45 ppt. With the expected range of precision being at most five parts per thousand, it has been observed that the molarity of the standard Disodium EDTA solution includes some obvious error. It seems that the observation of color change when Na2EDTA was titrated to the mixture of CaCO3, DI water, Eriochrome Black T, and ammonia/ammonium chloride was the most error prone. Not knowing when to stop titrating the EDTA solution, would have accounted for a misreading of measurement for the total volume of EDTA solution added to complete the titration, making the final molarity for that trial less than what was expected. Table 2 Based on the molarity results from table 1 and the data from table 2, the average calculated water hardness of unknown water sample 40 was calculated to be 250.9 ppm CaCO3. The water hardness of unknown water sample 40 for each individual trial was calculated as follows: =Total EDTA soln Delivered L0.02500 L CaCO3 solnÃâ€"0.004197 mol EDTA1 L EDTA solnÃâ€"1 mol CaCO31 mol EDTAÃâ€"100.1 g CaCO31 mol CaCO3Ãâ€"1000mg1.0 g Average Water Hardness (ppm)≠¡mg CaCO31 L CaCO3 Interpretation of Results Based on the data, the calculated water hardness of the unknown sample number 40 (250.9 ppm), is within range of the city of Phoenix’s calculated range of 164-291 ppm (2) and the city of Tempe’s calculate range of 150-400 ppm (3). References 1. Complexometric Determination of Water Hardness, Procedures, Mesa Community College CHM152LL website, http://www.physci.mc.maricopa.edu/Chemistry/CHM152/index.html, accessed 9/7/2013. 2. City of Phoenix website. http://phoenix.gov/waterservices/quality/index.html, accessed 9/8/2013. Copyright 2013 3. City of Tempe Az website. https://www.tempe.gov/index.aspx?page=1289#Hardness, accessed 9/8/2013. Copyright