Spectrophotometry Essay Example for Free

Spectrophotometry Essay Potassium permanganate (KMnO_4) is commonly used as an oxidizing agent and in this experiment, it is used as both the titrant and indicator. A standard of potassium permanganate solution was prepared and computed to be 0. 02235 M and was used to titrate a sulfuric acid solution wherein the sample salt was dissolved. The solution was heated to 90Â °C then titrated until a light pink colored solution was obtained. The experiment focused on determining the percentage of Sodium oxalate (Na2C2O4) in the sample and at the end of the experiment it was found to contain 49. 45%. Experiment 9 focuses on determining the different concentrations of potassium permanganate solutions by finding its absorbance through the use of spectrophotometer. Four known concentrations were prepared; 2. 5 x ? 10? ^(-3) M, 6. 25 x ? 10? ^(-4) M, 1. 25 x ? 10? ^(-4) M, 6. 25 x ? 10? ^(-4) M. The solutions were placed on the spectrophotometer to determine absorbance together with the unknown. Distilled water was placed before each trial to ensure the accuracy of results. Determining the concentration of the unknown sample was done by drawing a graph of the concentration against the absorbance and was found to be Introduction Spectrophotometry is a method to measure how much a chemical substance absorbs light by measuring the intensity of light as a beam of light passes through sample solution. The basic principle is that each compound absorbs or transmits light over a certain range of wavelength. This measurement can also be used to measure the amount of a known chemical substance. Spectrophotometry is one of the most useful methods of quantitative analysis in various fields such as chemistry, physics, biochemistry, material and chemical engineering and clinical applications. A spectrophotometer is an instrument that measures the amount of photons (the intensity of light) absorbed after it passes through sample solution. With the spectrophotometer, the amount of a known chemical substance (concentrations) can also be determined by measuring the intensity of light detected.

Your Attitude Is Showing :: Business Marketing

Your Attitude Is Showing: A Primer of Human Relations I enjoyed reading "Your Attitude Is Showing" a great deal more than I expected to. I normally hate to read because I am not very good at it, and I am usually uninterested in the subject. I found that this book to be quite easy to read. The language that the authors used was very easy to understand. Also, it was divided into many chapters with many sections in each chapter. This made it easy for me to keep my attention on the book. When reading I normally become tired and bored, but I was able to focus well on this book. The content of the book also helped keep me interested. I felt that the authors addressed many important points throughout the book. Though I knew much of the information discussed, I also learned a lot from it. This is why I enjoyed the book the most, because it taught me things that I will use, and that are very important for how successful my life is, professionally and personally. Key Points When reading this book I found there to be many important points that were addressed in each chapter. I found three points in particular to be more valuable to me than the others. The first key point that I found was in chapter 2. â€Å"All organizations are built around people. And when you build healthy relationships with your fellow workers and supervisors, you open doors that would otherwise be closed.† I found this statement to be very interesting. This section went on to explain how knowledge of a particular job is not all that is important to succeed in a career. I had previously not realized this in my life, even though I have had personal experiences that reflect this. I was recently offered a management position at my current job. I thought that it was strange because I had relatively no experience working in retail, and I had only been working with the company for a few months. But after reading this section I realized that, most likely, the reason why they off ered me the job was because of the strong relationships I had developed with my supervisors and co-workers in such a short period of time. From now on I plan on keeping this point in mind whenever I begin a new job. The second key point that I found was discussed in chapters 3 and 4.

Macbeth: Post Traumatic Essay

Throughout the story, Macbeth seems to show symptoms of Post Traumatic Stress Disorder. Post traumatic Stress Disorder is an emotional illness that usually develops as a result of a terribly frightening, life-threatening, or otherwise highly unsafe experience. He starts experiencing terrifying events after he became a murder. Macbeth’s problem of experiencing symptoms of Post Traumatic Stress Disorder, when first killed the traitor in the beginning of the Act 1, Scene 2. Macbeth does suffer from PTSD and throughout the story, Macbeth show more symptoms of PTSD, dealing with the death of the traitor, Death of Duncan, and Banquo. In the first act, Macbeth is a soldier in the army. In the Act 1, Scene 2, the captain explains to the king, that Macbeth has killed the traitor. â€Å"Which smoked with bloody execution, like valor’s minion carved out his passage till he faced the slave; which nevr shook hands, nor bade farewell to him, till he unseamed him from the nave to the chops† (Act 1 Scene 2: 18-22). The killing of the traitor was the start of Macbeth’s killing spree, also the start of the post traumatic stress disorder. The way Macbeth killed the soldier, was very gruesome. The gory, intense event shocked Macbeth and left a horrible image in his head. Dr. Roxanne Dryden Edwards says â€Å"People who are exposed to war combat have been diagnosed with PTSD†. After that death, Macbeth’s next victim was King Duncan, so Macbeth could become king. Macbeth kills King Duncan, so he could become king. After the death of King Duncan, Macbeth enters the room, where Lady Macbeth is. His hands covered in blood, meaning that he has completed the deed of killing Duncan. â€Å"I have done the deed. Didst thou not hear a noise? † Dr. Roxanne Dryden Edwards, a person who has PTSD, will experience hallucination. † (Act 2, Scene 2). After the death of Duncan, Macbeth is unable to sleep. In the story, Since Macbeth killed Duncan in his sleep; it also means that Macbeth can’t sleep neither. â€Å"Since it cried â€Å"Sleep no more! † to all the house: â€Å"Glamis hath murdered sleep, and therefore Cawdor shall sleep no more: Macbeth shall sleep no more. † (Act 2, Scene 2: 40- 42). The symptom of PTSD is that after a terrifying event, the person will not be able to sleep. Dr. Roxanne Dryden Edwards says PTSD symptoms are chronic physical signs of hyper arousal, including sleep problems, trouble concentrating, irritability, anger, poor concentration. After the death of Duncan, Banquo was next line for death row, for knowing who killed Duncan. During Act 3 Scene 1, Macbeth talks to two murderers about killing Banquo. Banquo knows that Duncan’s murderer was Macbeth. Macbeth hired two murderers to kill Banquo, so Banquo would not tell anyone. † Have you considered of my speeches? Know that it was he in the times past, which held you so under fortune, which you thought had been our innocent self: this I made good to you in our last conference ;†( Act 3, Scene 1) The two murderers agree to kill Banquo, because if they didn’t follow Macbeth’s order, they would be killed themselves. Macbeth is being manipulative the reason why is that Dr. Roxanne Dryden Edwards says â€Å" PTSD causes a person to paranoid and not want to be around anyone. † After the death of Banquo, Macbeth started hallucinating as if he was seeing Banquo’s ghost. â€Å" Avaunt! And quit my sight! Let the earth hide thee! Thy bones are marrowless, thy blood is cold; thou hast no speculation in those eyes, which thou dost glare with. † Hallucinating is a symptom of PSTD, usually recurrent re-experiencing of the trauma, for example, troublesome memories, flashbacks that are usually caused by reminders of the traumatic events, recurring day mares about the trauma. Macbeth does suffer from PTSD and throughout the story; Macbeth shows more symptoms of PTSD, dealing with the death of the traitor, death of Duncan, and Banquo. Macbeth did have PSTD. Proving that all of the events that Macbeth was involved in all of the tragic. For the death of the traitor, that was the spark of Macbeth’s major killing spree. Next was the King Duncan’s death and finally was Banquo’s death. Each of these tragic events was the cause of Macbeth having PTSD. Every one of those deaths, increase the killing and made Macbeth go insane leading to his death. Isn’t better to show your true colors, than be black and white?

Minimum Wage The Cause of Poverty - Free Essay Example

Sample details Pages: 3 Words: 802 Downloads: 6 Date added: 2019/05/07 Category Law Essay Level High school Tags: Minimum Wage Essay Did you like this example? A mother of three travels to work each day but still struggles to provide for her children on a salary of $7.25 an hour. This is because she works for minimum wage. When people think about minimum wage they think about teens working but never do they think about the adults that work on this salary.When people start to think about these parents working on minimum wage they start to think about how the children live. Don’t waste time! Our writers will create an original "Minimum Wage The Cause of Poverty" essay for you Create order Most times the children live in poverty and are barely able to afford clothes or food. Saying this, minimum wage should be brought to $15 an hour so that parents can provide for their families.   Raising the minimum wage would help families of five live on a full-time minimum wage and not have to raise their children in poverty. Jason Furman states that Even with a $7.25-an-hour minimum wage, a family of five with a full-time, minimum-wage earner that receives food stamps and the refundable tax credits would fall $1,139 below the poverty line in 2009.( Raising the Minimum Wage Will Reduce Poverty) This shows that even when the price of minimum wage was raised from $5.15 to $7.95 Americans were still struggling to stay above the poverty line. This it is only in 2009 with legislation not indexing the wage for inflation families will fall even lower under the poverty line because inflation will erode the value of minimum wage., says Jason. (Raising the Minimum Wage Will Reduce Poverty). With that being said the wage would have to be raised again to a higher amount for any family to be above the poverty line. Knowing this information having minimum wage raised to $15 an hour with help families in the long run even with inflation.  More Americans work on minimum wage than those who dont and out of those people, most are adult women. According to the U.S. Census Bureaus Current Population Survey, tipped workers on minimum wage are overwhelmingly women, many of whom are supporting families. Overall, women make up sixty-two percent of tipped workers and seventy-two percent of waitresses and waiters one of the largest groups of tipped workers (A High Minimum Wage). As a result, most women are unable to support their families because they work on such a low wage. Overall, the family poverty rate for waitresses and waiters is 14.9 percent almost three times the rate for the workforce as a whole. And the rates are even higher for tipped workers as a whole since their wages are lower than those of waitresses and waiters ( A High Minimum Wage). Showing that most people who work on minimum wage are in poverty. With that said raising the wage would lower the percentage of people working on minimum wage in poverty.  People in America are even homeless and still, have jobs. A 1998 survey of Baltimores homeless found that 17% of those surveyed were employed and approximately 46% had lost their jobs within the previous year (The Homeless). Showing that even when some people have jobs that can not make enough to even buy a house for there family.Inadequate wages put housing out of reach for many workers. Working homeless people report that their incomes are not sufficient to afford a familys basic living needs ( The homeless). Even when people get jobs to try and make a living it is not enough to get a home so they are not homeless.  Ã‚  With this evidence, most would feel it is needed to raise minimum wage yet others still believe the price of minimum wage now is better for families of four and would actually affect them if it was raised because they will get fewer food stamps. Even though this could be true most families now still struggle to support their families even with welfare and food stamps. It is said that the increase would mean an additional $4,200 in annual earnings for a full-time, minimum-wage worker. It also would automatically trigger $1,140 in increases in the familys EITC and refundable Child Tax Credit, enough to roughly offset the decrease in the familys food stamp benefits resulting from the increase in the familys cash income. As a result, the family would be lifted five percent above the poverty line, instead of being 11 percent below the poverty line in 2009, as it would be under current law(Raising the Minimum Wage Will Reduce Poverty). This proves that even though raising the wage would reduce food stamp prices the result is still higher than it is now.  Ã‚  Families and citizens of America struggle every day working on minimum wage trying to provide for themselves and others. People need to make efforts to raise this wage so that the number of people homeless can be lowered. If this is done people will be more productive and put more effort into their work because they are earning more money.