Determining the Formula of an Unknown Hydrate Essay Example for Free

Determining the Formula of an Unknown Hydrate Essay The final equations that was concluded after the experiment and the calculations are CuSO4 à ¯Ã‚ ¿Ã‚ ½ 5H2O and MgSO4 à ¯Ã‚ ¿Ã‚ ½ 5H2O. There are 5 water molecules per Copper (II) Sulphate and 7 water molecules per Magnesium Sulphate. The compounds are all hydrates which is a substance that contains water. This occurs when crystals form from the evaporation of an aqueous solution of a salt and water molecules become included into the crystal. The hydrates were heated and lost its water of hydration and made it possible to calculate how much water was in the hydrate and the water to salt ratio. The percentage error for the Copper (II) Sulfate was 4.61%. It is a large error but the coefficient was correctly rounded to the accepted value of 5. The percentage error for Epsom salts was 5.51% which is also very large but can also be rounded to the accepted value of 7. Errors and Limitations Error Explanation Suggested Improvements No lid Without a lid on the evaporating dish, the powder popped out the dish when heated therefore causing the mass of the remaining substance to be lower Using a lid Imprecise measurements of mass Causing the mass of the evaporating dish, H2O and the remaining hydrate to be lowered or raised and therefore makes the final formula incorrect Making sure the surface of the scale is clean and waiting until the weight displayed has completely stopped No depth in experiment More experiments can be done for comparison and further our knowledge of hydrates Another Sulfate hydrate to compare the hydrates and see if there is a pattern of the different hydrate and the number of water molecules due to factors of periodicity. Also we could have also just used sulfate hydrate to observe how adding another element affect the water and salt ratio. Overheating of the substances The hydrates were heated under the Bunsen burner and were left under the heat for too long. This could alter the result by lowering the mass, which would increase the water to salt ratio. Mixing the powder to evenly distribute the heat to prevent overheating the salt. Not letting the substance cool before weighing it This would raise the mass of the anhydrate because the water molecules would not be entirely evaporated making the substance left heavier. Having more patience and letting the salt completely cool before weighing Oval chunks of CuSO4 remain after burning Not all of the water of hydration has been removed which will throw off the result by decreasing the mole of water and the increase the final water to salt ratio. Break up the chunks before heating or while heating.

David Guterson And His Use Of The Theme Of Nature Essay -- essays rese

David Guterson and His Use of the Theme of Nature   Ã‚  Ã‚  Ã‚  Ã‚  David Guterson, a young American author, has written two major works regarding aspects of human nature and human emotions. His first publication, a collection of short stories, entitled The Country Ahead of Us, The Country Behind addresses some of the moral dilemmas that humans face throughout their lives. His first novel, Snow Falling on Cedars, narrates the trial of a Japanese man accused of murdering a white man in the post World War II era. Throughout his literary works, Guterson uses elements of nature: land, trees, water and especially snow, as literal and metaphorical tools to develop and resolve conflicts.   Ã‚  Ã‚  Ã‚  Ã‚  David Guterson uses the same aspects and characteristics of nature in two different ways. First he describes in visual detail the literal or actual effects that elements of nature have on the characters in the story. But more importantly Guterson uses nature to convey substantial and symbolic meaning in the lives of the characters in his stories.   Ã‚  Ã‚  Ã‚  Ã‚  One of the elements of nature that Guterson uses as a tool to develop the conflicts in Snow Falling on Cedars are the strawberry fields on the island. These fields represent an important source of income for the community. Traditionally the Japanese laborers worked the fields and the white Americans owned the fields. The question of the ownership of seven acres of strawberry fields serves as the apparent motive for the murder of Carl Heine. To a local Japanese fisherman, Kabuo (accused of murdering Carl Heine), the ownership of this land promises a secure future and ultimately independence. â€Å"...she knew that Kabuo wanted a strawberry field.. nothing more than that† (Snow Falling 89). â€Å"His dream...was close to him now, his strawberry land, his happiness† (Snow Falling 456). The strawberry fields connected Kabuo to his past and symbolized a continuity of life. â€Å"My father planted the fathers of these (strawberry) plants† (Snow Falling 362).   Ã‚  Ã‚  Ã‚  Ã‚  Guterson also uses snow metaphorically to make the ownership of the strawberry fields disappear and seem unimportant in life (Snow covering the fields permitted the reader to veiw the ownership of the fields as a very materialistic and selfish thing). After the snow has fallen it acts as a purifier to a... ...nd. The snow changes in these scenes in the story as Guterson tells......................................................................   Ã‚  Ã‚  Ã‚  Ã‚  Snow is also one of the elements that can also be traced through Guterson's earlier works. In â€Å"Angels in the Snow† Guterson uses snow in the very same way that he uses snow as a metaphor in his novel. â€Å"Angels in the Snow† is a short story about the struggle for a man to maintain a truthful marriage with his wife. In this story the snow that falls on Christmas eve symbolizes the falling apart of his marriage due to unsurpassable problems. â€Å"Outside the window a light snow blew down... in the yard the grass looked sprinkled with powder†(Angels 3). Guterson weaves a tale about moralistic troubles that began in a young man's fragile past. â€Å"Outside, the snow covered the last of the lawn. The world looked hushed, delicate and beautiful.† ( Angels 7) This passage describes the delicate remembrances of the protagonist's youthful days. And then, â€Å"outside the falling snowflakes looked larger...a low drift was forming...† ( Angels 12). This statement is offered as Guterson's main character begins to confront his past conflicts.

Impacting factors on human social service Essay

Socio cultural factors are norms, values, beliefs, material and non material objects that are passed on from one generation to another in any given society .Socio cultural factors are crucial in any developmental aspect of a community.(Noyo Ndangwe p230) There is considerable interest in analyzing these factors that are impacting on human social service delivery and these are economic, religion, political and socio-cultural factors which are of special significance because of their tendency to shape the context or foundation for the operation of any other set of factors that operate upon human social service delivery. In this regard, we will try to look at one factor, that is, Socio cultural factor how it is impacting on human social service delivery. First and foremost would like to define the key concepts this assignment. 1. Socio means interaction. 2. Culture means the beliefs, customs, practices, and social behaviour of a particular nation or people. 3. Factors mean something that contributes to or has an influence on the outcome of something. 4 Impacting means to have an immediate and strong effect on something or somebody. 5 Social Service These are welfare programs aimed at enriching human life 6 Delivery means taking something to somebody.  The first to way to discuss this will be to try to analyse how socio-cultural factors affect the performance of Primary Health Care. There is now a large body of literature on the social and cultural determinants of health which ‘refer to both the specific features and pathways by which societal conditions affect health. The WHO has, for example, identified a number of socio cultural factors and conditions. The list of factors includes (i) cultural beliefs and taboos, (ii) gender inequality, and (iii) the urban – rural divide. The socio-cultural factors impacting on health will differ  between societies and even within sub-cultures within the same society. Thus the factors in a developed society will tend to differ from those that are operative in a backward, underdeveloped society. Factors such as urban-rural migration, unemployment, education, gender inequality, lack of money, transportation, distance to health facility, cultural inhibition, fear of going alone to health facilities, inability to make informed choices and the need to obtain permission from some authority figure such as the husband in the case of some married women have been cited (Social Determinants of Health: Nigerian Perspective: 2005). Social cultural taboos and social meanings attached to certain diseases and their causes are other socio cultural factors that are impacting on service delivery. Cultural beliefs and taboos Cultural beliefs and taboos impact upon the performance of the Primary Health Care in several ways. First, they shape forms of behaviour that lead to certain health outcomes. As an example, consider beliefs about fertility and family planning. People living in rural areas tend to want to have more children and not to want to use the more modern methods of family control (PHC, WHO: 2004). This has implication for population growth, the incidence of child and maternal mortality and the number in the population seeking access to health care. As another example, we can also consider the case of beliefs about HIV/AIDS. Quoting a UNESCO Report, Kickbusch et al (2002:4-5) have observed that in some parts of Africa, ‘people believe that clean and well-dressed individuals cannot become infected or that having sexual intercourse with a virgin will cure AIDS’. Ladipo et al (2003) have also reported a study on the perceptions of Gate keepers, the custodians of cultural beliefs and moral norms, about sexuality and HIV/AIDS in Nigeria. Using in-depth interviews with teachers, media representatives, religious, political and traditional leaders and focus group discussions among parents the study reported that the culture downplayed the sexual mode of transmitting the disease; ‘condom promotion was not accepted on religious grounds by most participants. Cultural beliefs not only also shape how individuals respond to forms of disease and illness but also choices about which forms of care should be accessed. For example, cultural beliefs about certain forms of disease may lead to silence and denial thus creating  veritable grounds for the continuation of behaviours and actions that promote the disease (Human Rights Watch, 2002). Studies of the social meaning of infertility in Nigeria have shown that beliefs about infertility play a determinant role in interpretation and treatment of infertility. Following these beliefs, most people used three treatment outlets: ‘churches (spiritualists), traditional healers and hospitals (orthodox medical treatment)’ (Okonofua et al 1997:211). Gender inequality Gender inequality impacts the Primary Health Care system through its contribution to lower status, lack of empowerment, higher rates of illiteracy, and higher levels of poverty for women. As in the case of illiteracy, these factors translate into higher incidence of ill-health for women and paradoxically, their lower capacity to access health care. For example, women with less education have less control over their sexual activities and therefore also more affected by sexually transmitted diseases. For example, HIV/AIDS which is transmitted largely through sexual activities is more prevalent among women than among men. The relative lack of control over their sexual choices also means that many more women get pregnant than should be the case. This has implications for fertility and maternal mortality rates. Women therefore have a higher need to access health care especially at the PHC level. Only women generally tend to need the permission of men to access health facilities. Poverty is also higher among women in the population than men. These factors suggest that women will also have a lower capacity to meet their health needs even when facilities exist to provide for those needs. The urban – rural divide The urban – rural divide is implicated in the differences in living conditions between urban and rural areas, in the distribution of the population between the two areas and in several other factors. Differences in these factors impact upon the performance of PHC in a number of ways. First, it imposes different challenges on PHC in urban and rural areas. It has been observed for example, that living conditions, especially with respect to the availability of electricity, good roads, water, transportation, communication, poverty and quality of life tend to be much higher in urban than rural areas (Imoudu, 1995). The implication of this is  the tendency for PHC units to be better staffed and equipped in urban areas than rural areas. It is thus not surprising to find that storage facilities for drugs are better in urban areas than rural areas (Gupta et al, 2004). Professional health personnels are also more reluctant to accept postings to rural areas. Another implication is the pattern and distribution of the disease burden between urban and rural areas. Given the fact that urban areas have more PHC facilities and that other secondary and tertiary health care facilities tend to be located in them, the health needs of urban populations tend to be better served than those of rural areas. There will therefore tend to be more pressure on PHC facilities in rural areas. If we take into consideration the additional factor of higher poverty in the rural areas, the lower capacity of rural communities to access health care when they need it will translate into worse health indices in the rural areas than urban areas. However it should be noted that socio cultural factors also impact positively in human service delivery in the following ways. Traditional medicines have become part or alternatives were modern medicine has failed. That not all in certain areas use of socio cultural factors has enhanced social service delivery in the areas of ceremonies which bring in foreign exchange and general leading to an improved standard of life of the people.eg prior to the kuomboka ceremony of the lozi people of western province, roads are graded, buildings painted, the towns and villages cleaned hospitality industry also takes a new shape which is a plus in service delivery. CONCLUSION Socio cultural factors are norms, values, beliefs, material and non material objects that are passed on from one generation to another in any given society. As we looked at how socio-cultural factors affect the performance of Primary Health Care we have noted that socio cultural factors are crucial in any developmental aspect of a community The socio-cultural factors impacting on health will differ between societies and even within sub-cultures within the same society. The WHO has, for example, identified a number of socio cultural factors and conditions. The list of factors includes (i) cultural beliefs and taboos, (ii) gender inequality, and (iii)  the urban – rural divide. The socio-cultural factors impacting on health will differ between societies and even within sub-cultures within the same society. Cultural beliefs and taboos impact upon the performance of the Primary Health Care in several ways. First, they shape forms of behaviour that lead to certain health outcomes. Gender inequality impacts the Primary Health Care system through its contribution to lower status, lack of empowerment, higher rates of illiteracy, and higher levels of poverty for women. BIBLIOGRAPHY: 1. Dr. Festus Iyayi, (2009), Socio cultural factors impacting upon Primary Health Care in Nigeria, Department of Business Administration, Faculty of Social Sciences, University of Benin, Benin City, Edo State, Nigeria 2. Global Health Watch (2004) Global Health Action, edited by Whyte, A., McCoy, D and Rowson, M, Russell Press 3. Noyoo. N, (2000), Social Policies and Social Services in Zambia. UNZA Publishers, Lusaka, Zambia. 4. Oxford advanced learners dictionary (2002).

Standardized Testing And Its Impact On The Classroom

Microaggressions can be any commonplace comments that are intended or not, to offend another person. However, one might think individuals would be aware if they inherently said something offensive. Microaggressions are even apparent in standardized testing and academia as test writers and teachers can unintentionally degrade students with a seemingly innocent statement. Standardized tests are allegedly supposed to test student’s knowledge of what they have learned or previously known. The tests also reflect the academic progress of the school to determine the quality of education that the school provides. Standardized tests seem to be an unbiased way of determining skill, but the tests do not take into account student’s home lives, as well†¦show more content†¦Instead of a student being scored on what they have written they are compared to two other essays to determine whether they fall closer to a high scoring essay or a low scoring essay. Anchor papers are a requirement since essays cannot be graded with an answer key, but are subjective to each individual grader. Anchor papers represent a well-written response to the essay question posed. However, educators have commented that it is difficult to compare these supposedly perfect papers to a variety of student’s diverse responses. The pressure, of comparing sample essays to individual responses often ends with inconsistently graded essays. In â€Å"Last Week Tonight with John Oliver Standardized Testing (HBO)† John Oliver makes light of the flaws in Pearson’s testing corporation. Oliver uses clips to convey these deficiencies. For example, Oliver shows a clip of test graders describing what it is like to grade standardized essays. Graders describe if their supervisors see them awarding too much of a particular score they are asked to see certain scores as higher or lower than they deserve. According to David Puthoff, a grader with Questar, when he was confronted with an essay about the good qualities of a leader in Louisiana one student’s response was Martin Luther King Jr. This response was deemed to be incorrect. The essay employed correct use of AAE and demonstrated accurate rules for this dialect. However, the student did not directly answer the