Chemistry Lab Preparation Of A Dye - 830 Words

CH 220C – Organic Chemistry Lab Experiment 14: Preparation of a Dye: Azo Violet Rodan Devega Introduction The purpose of this laboratory experiment was to synthesize azo violet, and conduct a product analysis in the form of a dyeing test and indicator test. Synthesizing azo class dyes typically involves two steps, diazotization and diazonium coupling. Diazotization is the conversion of a p-nitroaniline’s amino substituent to a nitrogen-nitrogen triple bond, resulting in the formation of an aryl diazonium salt. It is facilitated with sodium nitrite and hydrochloric acid. Diazonium coupling, an electrophilic aromatic substitution, is the coupling of the aryl diazonium salt and resorcinol to form azo violet. It is facilitated with sodium acetate. Product analysis was conducted on azo violet in an effort to examine its response to the pH of different solutions (indicator test) and confirm its identity (dyeing test). Data and Results Qualitative observations concerning the synthesis of azo violet can be found on page 52 of carbon-copy notebook. Discussion A phosphodiesterase (PDE) is any enzyme that has the ability to break down phosphodiester bonds. Enzyme regulation may occur via metal-dye complexes within biological cells. Azo class dyes are molecules characterized by nitrogen-nitrogen double bonds that allow for conjugation within the molecule. Additionally, these dyes portray the essence of color as it reflects back light of different colors that is not absorbed. AShow MoreRelatedMy Career In Energy Technology1302 Words   |  6 PagesBackground My career in energy technology began in 2012, when I started my master’s coursework and research in electrochemistry at the University of Louisville’s Department of Chemistry. Since then, I have developed an extensive skillset, focusing mainly on the development and usage of semiconductor materials such as titanium oxide (TiO2), tin-oxide (SnO2), birnessite-manganese oxide (b-MnO2), and neodymium oxide (Nd2O3). I have extensively studied the photophysics and photochemistry of energeticRead MoreMy Career In Energy Technology And Surface Chemistry1386 Words   |  6 PagesBackground My career in energy technology and surface chemistry began in 2012, when I started my master’s coursework and research in electrochemistry at the University of Louisville’s Department of Chemistry. Since then I have developed an extensive skillset, focusing mainly on the development and usage of semiconductor materials such as titanium oxide (TiO2), tin-oxide (SnO2), birnessite-manganese oxide (b-MnO2), and neodymium oxide (Nd2O3). I have extensively studied the photophysics and photochemistryRead MorePreparation of P-Nitroaniline1671 Words   |  7 Pages 1 mol = 1.839 g Experimental yield of p-Nitroaniline: Amount of p-Nitroaniline by mass obtained in lab: 1.74g % yield: Actual yield x 100% = 1.74 g x 100% = 94.62% Theoretical yield 1.839 g % difference from theoretical = |1.74 g Ââ€" 1.839 g| x 100% = 5.38% 1.839 g Discussion The final yield for the preparation of p-Nitroaniline experiment was 1.74g, giving a percentage yield of 94.62%. The theoretical yield obtained throughRead Morestudy of adulterants in food stuff1901 Words   |  8 PagesPROJECT OF CHEMISTRY STUDY OF ADULTERANTS IN FOOD-STUFFS Index Certificate 3 Acknowledgement 4 Food adulteration 5 Infections due to adulteration 7 Experiment-1 9 Experiment-2 10 Experiment-3 11 Bibliography 13 Certificate of Authenticity This is to certify that a student of  class 12th has successfully completed the research project on the topic â€Å"Study of adulterants in food-stuffs† under the  guidance of This project is absolutely genuine and does not indulge in plagiarism ofRead MorePreparation of Acetanilide1398 Words   |  6 PagesLearning Activity 1 Preparation of Acetanilide Abstract Recrystallization is a common method of purifying organic substances through the difference in solubility at different temperature. In this experiment, acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heating water bath. The solution was cooled slowly in an ice bath as crystals form out. As the compound crystallizes from the solution, molecules of other compoundsRead MoreSynthesis Of Triphenylamine Based Dye And Fabrication Of Dssc Device3205 Words   |  13 PagesReport for B.Tech Project Synthesis of triphenylamine based dye and fabrication of DSSC device A Project Report Submitted to the Department of Chemistry, Indian Institute of Technology Guwahati As a part of the requirement for the degree of Bachelor of Technology by Arvindh Sekar Roll No. : 11012206 Statement I hereby declare that the work embodies in this project report titled Synthesis of triphenylamine based dye and fabrication of DSSC device by Arvindh Sekar represents an originalRead MoreNitration of Cobalt(Iii) Acetylacetonate4150 Words   |  17 PagesRossi/Kuwata Chemistry 222 Spring 2011 Experiment 2: Spectrophotometric Determination of Iron in Vitamin Tablets (Adapted from Daniel C. Harris’ Quantitative Chemical Analysis and R. C. Atkins, Journal of Chemical Education 1975, 52, 550.) Experimental work to be done on February 24 + one hour scheduled on your own Notebook due on March 4 (by 4:00 pm ⇒ 20% late penalty each 24 hour period thereafter) INTRODUCTION In this experiment, you will dissolve the iron in a vitamin supplement tablet,Read MoreEssay about Basic Chemistry for Investigating Living Systems7868 Words   |  32 PagesLABORATORY 3: LABORATORY 3: Basic Chemistry for Investigating Living Systems Abstract The purpose of this experiment was to explain how colorimetry can be used to qualitatively detect cellular chemical components; to chemically differentiate between proteins, sugars, starches, and lipids; to identify the roles of molecular components in living systems; to comprehend the value of using a systematic approach to research; and to describe why hypotheses, controls, standards, and quality controlRead MoreFood Additives: Pros, Cons, and Some Ideas for the Future2801 Words   |  12 Pagescontemporary day and age we refer not only to simple changes applied to the food with commonly found natural substances as in the pre-industrial era, but to more complexly engineered changes developed from the designs of food scientists in far-off labs. On the whole, there is a very significant amount of processing done to our food between the points at which it is taken from nature as an ingredient, to the point that it reaches our mouths at the table. There are literally thousands of vari ous additivesRead MoreA Form Of Geometric Art Invented By The Famous Dutch Artist2670 Words   |  11 Pages238). By the year 1925, the students at the Bauhaus were privileged enough to study under these original elementary artists and architects. Walter Gropius, a German-American artist, started referring to the architectural study at the school as a preparation for the life at modern industry. They believed the machine to be their contemporary instrument of design. Craft training helped the students to get an overall experience of their future life in their respective field and also prepared them to be

Essay on I Am Sam - 1694 Words

I Am Sam is the compelling story of Sam Dawson (Sean Penn), a mentally-challenged father raising his daughter Lucy (Dakota Fanning) with the help of an extraordinary group of friends. As Lucy turns seven and begins to intellectually surpass her father, their close bond is threatened when their situation comes under the scrutiny of a social worker who wants Lucy placed in foster care. Faced with a seemingly unwinnable case, Sam vows to fight the legal system and forms an unlikely alliance with Rita Harrison (Michelle Pfeiffer), a high-powered, self-absorbed attorney who initially takes his case pro bona as a challenge from her colleagues. On the surface the two couldnt be further apart, but in reality they are subtly similar. Sams†¦show more content†¦I Am Sam (rated PG-13 by the M.P.A.A. for language) will be released in Los Angeles and New York on December 28th, 2001 and wide on January 25th, 2002. about the story I Am Sam is a powerful, emotional film about love, parenthood and the bonds of family. Im fascinated by what makes a family and how people create that in untraditional ways, says director and co-screenwriter Jessie Nelson. I think all parents at times feel confused and overwhelmed. It is a common bond between every parent on the planet, whether youre disabled or not. Parents who are disabled provide a unique metaphor for how were all trying to get through an incredibly challenging world and how we all ultimately need some type of support system. Raising a child is never easy, but like everybody, Sam Dawson (Academy Award nominee Sean Penn) has learned to adapt. Sam and his daughter Lucy (Dakota Fanning) have gotten through the basics, though not always in the conventional way, with the help of Sams tightly-knit group of friends. Though Lucys life has never been what anyone would ever call normal, it has always been animated with humor and full of love. Lucy and her dad go to IHOP on Wednesday, video night on Thursday, karaoke night on Friday, says Dakota Fanning, the 7-year old newcomer who plays Lucy Diamond. They just have the best time together. But when LucyShow MoreRelatedI Am Sam Movie Review894 Words   |  4 PagesI am Sam I am Sam is a 2001 American drama film written and directed by Jessie Nelson, starring Sean Penn as Sam who has an intellectual disability that had sole care for his daughter Lucy Diamond played by Dakota Fanning. The two of them encounter problems with the Department of Child and Family Services as they believe the presence of Sam’s intellectual disability negates his ability to parent. A lawyer Rita Harrison played by Michelle Pfeiffer plays an important role in this film as sheRead MoreI Am Sam s Mental Retardation999 Words   |  4 PagesI am Sam was quite possibly one of the best movies I have ever seen in my life. I was personally very moved by the entire story. I learned a lot about how these kinds of cases usually pan out for those that are mentally disabled. I had not ever thought of a story like this, but now that I was opened to these kinds of issues in the lives of people with mental disabilities, I am glad that I watched this movie and gain some insight. Sam faced several psychological issues in this story. Out of all theRead More I am Sam Movie Review Essay examples431 Words   |  2 PagesI am Sam Movie Review 1. Movie Title   Ã‚  Ã‚  Ã‚  Ã‚  I Am Sam 2. Year of Production   Ã‚  Ã‚  Ã‚  Ã‚  2001 (Theatrical) ? 2002 (Home Video) 3. Feature Length   Ã‚  Ã‚  Ã‚  Ã‚  134 Minutes 4. Director   Ã‚  Ã‚  Ã‚  Ã‚  Jessie Nelson 5. Producers and Studio   Ã‚  Ã‚  Ã‚  Ã‚  Director/Producer Jessie Nelson, Executive Producer David Scott Rubin Producers Edward Zwick, Marshall Herskovitz, Richard Solomon.   Ã‚  Ã‚  Ã‚  Ã‚  New Line Home Entertainment 6. Major Character Cast   Ã‚  Ã‚  Ã‚  Ã‚  Sam Dawson played by Sean Penn   Ã‚  Ã‚  Ã‚  Ã‚  Rita Harrison played by MichelleRead MoreI am Sam Disability1394 Words   |  6 Pages I chose the movie I am Sam to challenge my own opinion on how people with disabilities should be treated under certain circumstances. I am Sam is a movie about a mentally challenged man, named Sam, striving to raise his daughter, Lucy, alone. Diagnosed with Autism, Sam’s intellectual capacity cannot exceed the age of 7. As we watch Lucy grow up under Sam’s roof, we are able to see the love they have for each other. When Lucy reaches the age of 8, social workers see this as an issue, so they placeRead MoreI Am Sam Essay1490 Words   |  6 PagesI Am Sam December 16th, 2010 In the movie I Am Sam, I will be discussing two elements of communication, facial expressions and the social exchange theory of relationships. I will be describing two different scenes of the movie to show how facial expressions are an important element of communication as well as two other scenes to show how the social exchange theory of relationships works in this movie. During the final custody hearing to determine if Sam, who has the mentality level of a sevenRead MoreI Am Sam Analysis1508 Words   |  7 PagesIn the film ‘I Am Sam Directed by Jessie Nelson as the main storyline of this film that show in that anything is possible to fulfill to get where you want to be no matter what kind of Disability a person has. The Director shown a huge importance in the filmed of a real life situation to the viewers. In which a man named Sam Dawson a loving, caring mentally challenged father that takes care of his daughter Lucy. The movie shows a more real-life situation that was when Lucy turns 7 she passes herRead MoreAnalysis Of I Am Sam848 Words   |  4 PagesThe movie, I Am Sam is about a single father who has a developmental disability and who has an IQ of a seven-year-old who wants and tries to take care of his baby daughter. He had his daughter, Lucy with a homeless woman and she left Sam just after she had her. There are some complications an d then he loses her through court because people convince him he could not give her the love she deserved. The article online and the movie were the same. In many people’s opinion, books are better than the moviesRead MoreFinding The Underlying Conflict Sam1113 Words   |  5 PagesThe director may have used this portion of the movie to establish the underlying conflict Sam is being questioned about. The court system consistently states that Lucy will surpass his IQ by her next birthday. The judge claims that due to his â€Å"low intelligence,† Sam will not be able to take care of Lucy as well as someone with a higher mental age. Although this is the court’s assumption, does this make Sam any less capable of raising Lucy? Mindsets such as Henry Goddard, author of the Kallikak FamilyRead More Mental Retardation Essay510 Words   |  3 Pagescan receive an education and lead a productive role in society. I Am Sam is about a mentally retarded man named Sam (Sean Penn). In the beginning of the movie Sam is left to care for his child alone. The childs mother leaves them both and never returns. Sam raises Lucy with the help of a neighbor and friends. When Lucy reaches the age of seven she begins to realize her fathers disability, something I she never noticed before. This realization begins causing problemsRead MoreMy Movie Reflection1314 Words   |  6 Pagesmovie changed my outlook on everything. Sam is a man who has a mental disability and he got a woman pregnant. The woman took off when she gave birth and left Sam with the baby. Sam tried very hard to raise his daughter Lucy, but due to the fact that he had a mentality of a 7 year old, he had a hard time. He got help from her God Mom, Annie, who was also Lucy’s piano teacher later on. Sam’s friends, who had disabilities as well, helped him with Lucy. Sam worked at Starbucks and it showed examples

How Leeds Was Like Durning the Victorian Times Free Essays

Life in Leeds was ghastly; many sources tell me this from pictures, to rhymes, reports and drawings Leeds was a well polluted and unhygienic place, Leeds also did not have any proper sewage system causing diseases to spread killing innocent civilians. First pictures of Leeds Steel works which was taken in 1864 show me that factories created poisonous gases that normal everyday public inhaled. My first source also shows that from a distant view the air itself was murky and unclear. We will write a custom essay sample on How Leeds Was Like Durning the Victorian Times or any similar topic only for you Order Now Source 1: As I mentioned before there are many sketches by anonymous artists who express their art from what they can see around their environment. This gives me more evidence that Leeds was very dirty and polluted. Source 2: Rhymes and songs were created by the people (most probably the children) who inhabited Leeds at the time one of the most famous rhymes were: â€Å"The Aire below is doubly dyed and damned; The air above with lurid smoke is crammed ; The one flows streaming foul as Charon’s Styx, Its poisonous vapour in the other mix†. What it is really translating is the water below (the river AIre) is coloured in an unnatural state and it is supposedly damned, the air above is crammed with toxic smoke, its poisonous vapours reaching us. Therefore it was commonly known that the Leeds was contaminated and filled with pollution. In 1842 Edwin Chadwick, a politician who was trying to make improvements and reforms to the conditions of towns and cities conducted an investigation into ‘Sanitary conditions of the labouring population. Edwin used local investigators to provide evidence of urban public health conditions. A doctor, Robert Baker, provided information about the hygiene and how it was affecting Leeds. â€Å"Of the 586 streets of Leeds, 68 only are paved by the town, ie, by the local authorities; the remainder are either paved by the owners or are partly paved, or are totally unpaved, with the surfaces broken in every direction, and ashes and filth of every description accumulated upon many of them†¦ of the 68 streets†¦ 9 are not sewered at all, and ten only partly so; nay it is only within the three or four years past that a sewer has been completed† . This statement tells me that there were 586 streets in Leeds and only 68 were filled with pavements. Filth and Ash filled every direction; in those 68 pampered streets 19 of them did not have a sewage system at all! Only 10 streets had them; however the sewage system has only been completed 3 or 4 years ago. This source is reliable becaus e as a local doctor Robert Baker had experienced the severe horrific cholera outbreak of 1832. By 1838 as a town councillor, had contributed to a statistical survey of the town and went on to become a factory inspector by 1858. Cholera and other diseases broke out because of the poor sewer system when civilians had to ‘relieve themselves’ half of their waste was absorbed by the ground and was then entered the stream which people drank from! While the other half just flowed through the streets waiting to infect civilians with putrid bacteria and filth . Public people also used to wash and bath in the river AIre causing its natural water colour to die out and for it to be swarmed with dirt and bacteria. For my conclusion I still stand by my decision that Leeds during the Victorian times was a filthy, disgusting place. Its water was not safe to drink and was revolting, although the simple workmen who build hundreds of factories hoping that it would not hurt the ozone lair still poisoned the air that the poor Victorian people breathed and lived in. How to cite How Leeds Was Like Durning the Victorian Times, Papers

None Provided5 Essay Paper Example For Students

None Provided5 Essay Paper On July 4, 1776, the Second Continental Congress, meeting in Philadelphia in the Pennsylvania State House (now Independence Hall), approved the Declaration of Independence. Its purpose was to set forth the principles upon which the Congress had acted two days earlier when it voted in favor of Richard Henry Lees motion to declare the freedom and independence of the 13 American colonies from England. The Declaration was designed to influence public opinion and gain support both among the new states and abroad especially in France, from which the new United States sought military assistance. Although Benjamin Franklin, John Adams, Thomas Jefferson, Roger Sherman and Robert R. Livingston comprised the committee charged with drafting the Declaration, the task fell to Jefferson, regarded as the strongest and most eloquent writer. The document is mainly his work, although the committee and Congress as a whole made a total of 86 changes to Jeffersons draft. As a scholar well-versed in the ideas and ideals of the French and English Enlightenments, Jefferson found his greatest inspiration in the language and arguments of English philosopher John Locke, who had justified Englands Glorious Revolution of 1688 on the basis of mans natural rights. Lockes theory held that government was a contract between the governed and those governing, who derived their power solely from the consent of the governed and whose purpose it was to protect every mans inherent right to property, life and liberty. Jeffersons theory of natural law differed in that it substituted the inalienable right of the pursuit of happiness for property, emphasizing that happiness is the product of civic virtue and public duty. The concept of the pursuit of happiness originated in the Common Sense School of Scottish philosophy, of which Lord Kames was the best-known proponent. Jefferson emphasized the contractual justification for independence, arguing that when the tyrannical government of King George III of England repeatedly violated natural law, the colonists had not only the right but the duty to revolt. The assembled Continental Congress deleted a few passages of the draft, and amended others, but outright rejected only two sections: 1) a derogatory reference to the English people; 2) a passionate denunciation of the slave trade. The latter section was left out, as Jefferson reported, to accede to the wishes of South Carolina and Georgia, who wanted to continue the importation of slaves. The rest of the draft was accepted on July 4, and 56 members of Congress began their formal signing of the document on August 2, 1776. Bibliography: