Back Titration in Chemistry

A back titration is a titration method where the concentration of an analyte is determined by reacting it with a known amount of excess reagent. The remaining excess reagent is then titrated with another, second reagent. The second titrations result shows how much of the excess reagent was used in the first titration, thus allowing the original analytes concentration to be calculated. A back titration may also be called an indirect titration. When Is a Back Titration Used? A back titration is used when the molar concentration of an excess reactant  is known, but the need exists to determine the strength or concentration of an analyte. Back titration is typically applied in acid-base titrations: When the acid or (more commonly) base is an insoluble salt (e.g., calcium carbonate) When direct titration endpoint would be hard to discern (e.g., weak acid and weak base titration) When the reaction occurs very slowly Back titrations are applied, more generally, when the endpoint is easier to see than with a normal titration, which applies to some precipitation reactions. How Is a Back Titration Performed? Two steps are typically followed in a back titration: The volatile analyte is permitted to react with an excess reagent A titration is conducted on the remaining quantity of the known solution This is a way to measure the amount consumed by the analyte, thus calculate the excess quantity.

Management and Business - 6767 Words

Cover Sheet Student Name: Muhammad Usman Badar Student ID Number: MELB10442 Date: 25-04-2015 Please circle the relevant result and attach evidence at the back. Enter Unit code and name: BSBSUS501A Develop Workplace Policy and Procedures for Sustainability Assessment Component Result Theory Assessment C NYC Practical Assessment C NYC Unit Outcome C NYC Trainer/Assessor Name: Final Sign Off: Date: Note: Final Sign Off can only be done when the student has completed both theory and practical components of the unit. (Please attach evidence of theory and practical at the back of the coversheet) Develop Workplace Policy and Procedures for Sustainability†¦show more content†¦2. How are the elements of sustainability and ethics represented in the vision or the mission statement? Criteria for Evaluating a Mission Statement Is our mission statement focused on satisfying customer needs rather than being focused on the product? Does our mission statement tell who our customers are? Does our mission statement explain what customer needs our company is trying to satisfy? Does our mission statement explain how our company will serve its customers? Does our mission statement fit the current market environment? Is our mission statement based on our core competencies? (A core competency is a company strength.) Is our mission statement motivating and does it inspire employee commitment? Is our mission statement realistic? Is our mission statement specific, short, sharply focused and memorable. Is our mission statement clear and easily understood? Does our mission statement say what we want to be remembered for? 3. Does your organisations structure leadership and work culture actively support the ideas and standards expressed in these documents? Explain. In difficult financial times, companies face various moral issues to try to keep up with their competitors. Although these issues have a direct impact on employee decision making, businesses rarely address how employees should assess the ethics of their actions and incorporate ethics into their decisions. Often this can be alleviated by creating and maintaining a corporate culture with a focus onShow MoreRelatedBusiness Process Management2447 Words   |  10 Pagesbeen compiled by MAK Consultants to tackle the key areas of concern found within Dynatrix Pty Ltd and proposes potential solutions to the organisation. The key areas of review for this assessment include: †¢ Strategic and Tactical Planning †¢ Business Process flow and procedures This document summarizes the methodologies employed to complete the review and presents our findings and recommendations. 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Buffalo film review Free Essays

Do you want to fragrantly waste a mind-numbing hour and a half of your monotonous life? If you just threw you hand up in the air and shouted yes’, then Vincent Gallon’s film Buffalo ’66 is for you. You will be subjected to a remarkably mundane plot, which will leave you hopelessly confused and a little afraid. It’s only rendering feature is, perhaps, the artistic style in which it is created. We will write a custom essay sample on Buffalo film review or any similar topic only for you Order Now The film Is set In the overly Industrialized town of Buffalo where our mall character, Billy Brown. Who Is played might say, badly by Gallo himself, was born with regret ND raised with disinterest. We are fist introduced to Billy as he is being released from prison. We become reluctant voyeurs of his life. His first problem that he had to face after being released is searching for a bathroom. Yes! You real that right. For the first maybe 20 minutes of the film, he is running around in his bright red boots, and ill fitted clothes, looking quite Like a child holding his genitals searching for a place to relive himself. I really don’t understand the meaning of this either. But what an entrance to a movie. Throughout his hunt for a restroom, we are introduced to Lay. Gallo has decided to put her in a virgin blue dress, a doll like face and alienated from the rest of her dance class. In fact she looks very much like a prostitute. Gallo chooses to sexuality her, focusing the camera around her breasts. Maybe this is why Billy kidnaps her. Yes! I said kidnaps. Told you this was a weird movie. Well Billy makes Lay drive him to his parents house, because he can not ‘drive a stick, but along the way he makes her pull over so he can relieve himself behind a tree. Any normal person would have Just driven off and got the hell out of there. But Lay is not normal, she is alienated from society because of her lack of lets call it social skills. She decides to stay, and continue being kidnapped. Apparently his playground talk of ‘If you do this for me, I will be your best friend, you will be the best friend I have ever had’. However if we gallantly ignore this entire aimless and dreary plot all we have left is Gallon’s amazing use of techniques such as his use of colors, music and camera angles. Throughout Buffalo ’66, Gallo focuses on the abundant use of pale colors and lurid scenes, which portray a lonely sense of emotion and feeling. Gallo an accomplished musician composed a very suitable score to accompany the film. Having himself creating most of the songs Gallo was able to carefully control a great deal of the mood and feeling of each scene. His song ‘Lonely Boy playing at the start of the movie in the opening credits, starting when the Billy Picture is shown Is a good example of child in the picture. Another technique is Gallon’s use of overlaying images or videos over the top of the already playing film. He does this to show flashbacks to inform us of Billy’s past. Through these flashbacks we discover that Billy’s childhood was very harsh. We see his loss of innocence through his Fathers anger on his dog Bingo, and his Mothers lack of care when Billy has an allergic reaction to chocolate. We also see his innocence in the events that sent him to prison. With Billy’s Mothers obsession with the town’s local football team the ‘Buffalo Bills’, we see her lack of care in Billy as a child again. When Lay asks Billy’s mum to see a photo of Billy as a child, She then replies to husband â€Å"Where’s the Billy Picture? † He had one picture as a kid, ONE!! But as you walk into the house you see a bunch of pictures of Buffalo players. This is a major key to Billy’s alienation. He didn’t have a normal home and was treated like he wasn’t wanted. You will quickly grow tiered of Bill’s need to constantly repeat everything he says. You will find yourself getting frustrated and wishing you could somehow reach into the film and bring him to his senses, perhaps by rearranging his facial features. In the bowling ally scene we notice we see Billy and Lay in the photo booth, â€Å"Spanning time† together, Just â€Å"Spanning time†. At this point I found my self shouting at the screen telling him to Just â€Å"shut up†. One important event in the film is the scene between Billy and Lay in the hotel room. We witness them laying on a bed together and Billy looks very, well, uncomfortable, while Lay looks like she has been in this type of situation many times before. We have a bird’s eye view of this whole scene so we see every movement that is made. Slowly, very slowly Lay’s hand moves towards Billy’s, leaving them awkwardly holding hands, well touching hands. After what seems like an incessant amount of time, Billy rolls over, out of his very what must be uncomfortable position and him and Lay kiss. KISS! You heard me right. I thought it was Lay’s imagination to be honest. If you think it couldn’t get more awkward he curls up in the fetal position in Lay’s arms. WEIRD! But this does portray Billy’s childlike behavior again and his need for affection that his parents lacked to provide for him. I think I was thankful at this point in the movie though, because finally, finally, they ended up together. They are not alone anymore, because they have each other. Bit click ©, but never mind that. If forced to offer a quick summery of the film, I would answer in a forceful honesty, hat it is Just plain boring. So bleak and uneventful is the plot, that I would rather go bird watching. It’s only rendering features is Gallon’s cinematic techniques. There, in my view, are the movies great strength and manage to Just salvage it from complete ruin. So masterful is Gallon’s use of cinema that I should recommend this film to English school teachers and others that appreciate the subtle and obscure artistic works. To the rest of us, I would issue a warning to avoid the film, like stay at least give it 5 stars out of 10. How to cite Buffalo film review, Papers

The Change of the American Family free essay sample

The American family has changed dramatically over the past 50 years. During the 1950s, the Cleavers on the television show â€Å"Leave it to beaver† epitomized the American family. In 1960, over 70 percent of all American households were like the Cleavers: made up of a breadwinner father, a homemaker mother, and their kids. Today much of the recent research indicates the traditional American family is not a model anymore in the sense that, there is no ideal or normal family. Family is now defined by some sociologists as, â€Å"a unit comprising two or more people who share a residence for a substantial period of time and have legal or moral responsibilities for long term care for each other (our social world p287). As time passes we evolve with all the changes in our society and people are living and thinking how they feel instead of keeping up with the values and morals society once followed. We will write a custom essay sample on The Change of the American Family or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Each of us has a concept of the typical family and how it has changed overtime. Being rooted in our own family experience and community, our views are seldom, if ever, an accurate depiction of the typical family. It is fair to say that there is no such thing as the â€Å"typical† family. In our nation the characteristics of families vary dramatically by race and ethnicity, age and income of adult members of the family; religious affiliation; region of the country; and by the demographic, social, and economic factors (monthly labor review p4). One change that has affected the modern American family is Divorce. Back then divorce was uncommon. Single parent households were very rare. The last 50 years have seen a dramatic rise in divorce (the u. s has the highest in any industrialized nation), cohabitation rather than marriage, blended families of both gay and heterosexual design, and children born out of wedlock. Another change that has affected the modern American family is immigration. Immigration has changed the modern family from what America has considered the normal type, too many different races and families. Interracial couples have become more accepted over the years, as it was once viewed as wrong and what caused a lot of racial bigotry and crimes of hate becoming more prominent, but in these times it is much more accepted. Our society has evolved and has become more accepting of the new ideas in what family is. The rise of dual career, two income marriages have transformed from time. More American women are employed now as so to their husbands. While husbands are more involved in child bearing, the bulk of the housework and parenting still falls on the woman. It becomes a balancing act between care-giving demands, spousal engagement and job responsibilities. Self-definition can become a heavy burden when there is no one to come home to. Today people are able to make choices now, than back then they couldn’t due to fear of judgment from others or because of religious belief etc. with our choices and things like rational theory these changes have become more prominent. After all rational theory happens when â€Å"the costs outweigh the rewards† (our social world pg290).