An Introduction to Qualitative Analysis - 1588 Words

An Introduction to Qualitative Analysis Purpose: Tests the ions of Mg2+, Ca2+, Sr2+, and Ba2+, and identify them separately. By using these observations, identify the unknown ion. Then tests the ions of SO42-, CO32-, Cl-, and I-,identify them separately, and use the observation to identify the unknown. Procedure Part I - Qualitative Analysis of Group 2 Elements Mix 0.02M K2CrO4 with each Mg(NO3)2, Ca(NO3)2, Sr(NO3)2 and Ba(NO3)2 together. Secondly, mix 0.1M (NH4)2C2O4 instead of 0.02M K2CrO4 together with the same reactants used before. Thirdly, mix 0.1M Na2SO4 with those reactants. Then, mix 0.1M NaOH with the same reactants used before again. Some precipitates should forms ,record the observations in Table 1.†¦show more content†¦State the identity of your unknown (along with its sample number). Give the reasoning you used to arrive at this conclusion. The Unknown Z should be SO42- because it has a same property as SO42- does. When SO42- is added to Ba(No3)2, and AgNo3, it forms a ppt; for the unknown anion, when it is added to Ba(No3)2, and AgNo3, it forms a ppt as well. When HNO3 is added to BaSO4, the ppt disappeared; for the unknown anion, when HNO3 is added to unknown, the ppt disappeared too, therefore we can conclude that the unknown is SO42-. Follow-Up Questions: 1. Devise a sequence of reactions to follow (using filtering or centrifuging where necessary to remove precipitates) to identify an unknown containing two or more cations of Group 2 elements. The Group 2 elements are Mg, Ca, Sr, and Ba. To identify an unknown containing two or more cations of Group 2 elements, first add CrO4 into the solution. Then we could identify them with their colour. Next we add C2O4, if the ppt is formed, then we know Ca2+ is involved in the solution. Next we add OH into the solution, if a ppt formed, that means Mg2+ is involved in the solution. 2.Devise a sequence of reaction to follow (using filtering or centrifugingShow MoreRelatedAnalysis Of Kendal Et Al Developed Around The Idea Of Young People, Eating Disorders Essay1467 Words   |  6 PagesQualitative The research conducted by Kendal et al developed around the idea of young people, eating disorders and how this was extended on to social networking, specifically through a discussion forum run by an eating disorders charity. The Critical Appraisal Skill Programme (CASP) was utilised to identify the quality of the research Boeckmann and Rohn (2014). 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The Sun Accounts For The Earth s Energy - 1054 Words

The Sun accounts for the entirety of Earth’s energy. While the sun is the driving force of all living organisms on Earth, this energy must be balanced in order for the Earth to maintain a constant global temperature. The Earth distributes this energy through oceanic and atmospheric circulation. This distribution of energy determines the location of biomes throughout the world. These two circulation processes also affect air pressure gradients in tropical parts of the world. They are also responsible for weather phenomenon’s like El Nià ±o. As shortwave radiation from the sun reaches the Earth, about eighteen percent of this radiation is absorbed into the atmosphere. The remaining energy is reflected back or absorbed by the Earth. This reflection is known as albedo. Objects with a higher reflectivity have a higher albedo and vice versa. Similar to the sun, the Earth and its atmosphere also emit radiation. 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Effects Of Dehumanization Of Minority Groups - 1101 Words

Journal 1: Dehumanization of Minority Groups As a result of the most recent Presidential Election, many minority groups like Muslims and Hispanics are dehumanized. It was said that current president, Donald Trump, had expressed many concern of the United States and linked them to certain minority groups. By doing so, Trump was able to promote controversial policies like building a wall between Mexico and the United States and create databases to track Muslims. Ironic as it sounds, Trump wanted the United State citizens to pay for the creation of this wall, if not, have the citizens of Mexico pay. The main aspect of this article was to promote the awareness of dehumanization among the United States to certain minority groups like the†¦show more content†¦The article focuses only on the locality perspective and not the perspective of the minority groups. Not only the race card was used, but also sexual orientation still play a role in our society today. People who perceive themselves as gay, bi, trans, etc. are being dis criminated. As bad as it may sound, the society we live in are filled with people who are discriminated by our society, yet, these groups only want to be noticed and for their impact on our society. Being one of the most diverse countries around the world, minority groups and immigration builds our society that we live in. I thought it was interesting that the author of this article wrote that we observed that blatant dehumanization was correlated with supporting each of the candidates, with the exception of Hillary Clinton. Specifically, support for Bernie Sanders was associated with less dehumanization of *p .05. **p .01. ***p .001. Mexican immigrants, whereas support for each of the Republican candidates (Donald Trump, Ted Cruz, Jeb Bush, Scott Walker, and Rand Paul) was associated with greater political conservatism and prejudice. Those who dehuman- dehumanization. Mainly because the issue of white supremacy still exist as of today and that the candidate that one vote for will impact the future of the United States for next four years. Knowing that Donald Trump had won presidency, people should expect a more racial andShow MoreRelatedLuis Velazquez. 3/20/2017. Wednesday 10 A.M. Lecture. Id1458 Words   |  6 Pagesracism therefore it has not helped eradicate anti-blackness and other forms of ra cism in society because it ignores the struggles blacks face for being black. Anti-blackness is achieved by the dehumanization of black bodies by society in order to create a negative image of black lives. This dehumanization then allows members of society kill blacks, discriminate blacks, and assault blacks with impunity. 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Boyz Ii Men free essay sample

I went to the Boyz II Men concert in Worcester, Massachusetts. The two opening acts were Brandy and Babyface. One word to describe them, fantastic!!! For fifteen-year-old Brandy, she had it all. A nice voice and a great performance. Babyface followed and he was amazing. A great artist with extraordinary talent. At one point, Babyface picked a girl from the audience and started singing to her. He also gave her $500 dollars and he said that each of the hundred dollar bills was for a time she was broken-hearted. Before Boyz II Men went on stage, my three friends and I went backstage and met them. It was amazing, just like their performance. They were very nice and friendly. They gave each of us a bag filled with memorabilia. They sang new and old songs, which was great. Another great time was when they came from under the stage, holding roses while singing Ill Make Love To You. We will write a custom essay sample on Boyz Ii Men or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page They threw the roses to the audience. I thought that it was very romantic. I would definitely go see them again in concert. It was a great night and worth every penny