Who's cheating on the vinegar?
Chemistry Course Work - Neutralisation of ethonoic acid Who's cheating on the vinegar? Task: A chip shop owner buys his vinegar from 4 different suppliers A, B, C and Safe way. He suspects that at least one of them waters down the vinegar supplied to them by the manufacturer. You are the analytical chemist assigned to investigate this. You have already planned an experiment that will give you the evidence you need. The following results have been taken from a similar experiment. Your task is to analyse these results and present your conclusion. You must then evaluate the experiment by assessing its success in answering the original question, explaining any anomalous results, and suggesting any possible improvements. Aim: I have been asked to find out if any of the suppliers have been watering down the vinegar they have supplied to the chip shop owner. I will do this by using a technique called Titration. Vinegar is ethonoic acid What is Titration? Titration is a form of neutralisation. This is a process of determining the concentration of a substance in solution. A measured amount of a known solution concentration (molarity) is added to an unknown volume of a second solution in carefully measured amounts until a reaction of definite and known proportion is completed. Neutralisation is when a Hydrogen ion and a Hydroxide ion react together to form water which is
Why are some pressure groups more successful than others?
Why are some pressure groups more successful than others? A pressure group is an organisation that may be formal or informal whose purpose is to further the interests of a specific section of society or to promote a certain cause; there are many reasons why a pressure group would want to do this too. There are various degrees of success with pressure groups, ranging from amending or passing Acts of Parliament to gaining public support. One thing that can alter a pressure group's success is whether the group is an insider or outsider group, and its relationship with the government. An insider group is one that operates within the political system and which normally has support from MP's, they are normally consulted by the government on matters that may affect the group or its members. The British Medical Association is an insider group and is consulted by the government regularly, recently they were included in discussions over the proposed NHS reforms and as a result of those talks the reforms were altered. Insider groups will have regular contact with MP's and other decision makers and so have more opportunities to influence them and their policies. However, an outsider group is one that operates outside the government, they have no special links with them but they still seek to influence decision makers by (usually) mobilising public opinion, an example would be Fathers
The Use Of Enzymes In Industry
The Use of Enzymes in Industry Skills I and J Enzymes are extremely useful and therefore are used in many industries. The reason for them being so useful is that they work quickly and efficiently to speed up the rate of many different reactions without going through changes themselves; this also makes them reusable.[5]This is all down to them being biological catalysts. The food industry is a major industry which relies on enzymes and probably the main place in this country where they are used. Throughout the industry there are numerous different areas which involve enzymes to make the process quicker. Some of these are; Fruit, Dairy, Brewing, Starch and Baking. Throughout the process of making fruit juices enzymes are used; as fruits contain pectins which are polysaccharides and cause cloudiness in the juices. To reduce this pectin and increase the amount of juice degrading enzymes are added at the pressing stage as the fruits are being modified. Therefore customers get better juice which isn't as cloudy and the company's gain more profit as they are making a larger quantity of juice.[7] Dairy products like cheese are made with the help of two enzymes, pepsin and chymosin. As cheese is made from raw material milk, the milk has to be warmed and these two enzymes added in order for the milk to form 'curbs and whey'. The product of this is a cloudy thick liquid containing
The use of pectinase in fruit juice production
The use of pectinase in fruit juice production I predict that there will be no juice produced to the apple sauce that had no enzyme and juice will produce to the apple sauce that had pectinase. A control is carried out in order to compare the rate of reaction between with pectinase and without pectin's. Pectin --> sugars + galataronic acid Pectin is a substance which helps to hold pant cell walls together. As a fruit ripens the plant produces proteolytic enzymes, which convert the insoluble protpectin of the unripe fruit into more soluble forms, causing the fruit to soften. When fruits are mashed and pressed to form juices these more soluble forms of pectin enter the juice, making it cloudy and causing the colour and flavour to deteriorate. Enzymes are specific in the reactions they catalyse, much more so than inorganic Catalysts. Normally, a given enzyme will Catalyse only one reaction, or type of reaction. The enzyme has an active site that helps it to recognise its substrate in a very specific way. Just like a key only fits into a specific lock, each enzyme has its own specific lock; each enzyme has its own specific substrate. This is called the lock and key theory. The enzymes never actually get consumed in the process; they just increase the rate of reactions. When enzymes denature the heat starts to destroy their shape and structure. The shape of the enzyme is so
To investigate the effect of temperature on the enzyme catalase.
To investigate the effect of temperature on the enzyme catalase Aim: To investigate the effect of temperature on the enzyme catalase Apparatus Celery extract (catalase) Labels 20 Volume hydrogen peroxide Distilled water 6 100cm beakers 20cm and 50 cm measuring cylinders Balance Stopwatch Trough Clamps & stand 50cm conical flask + bung + tubing + 3 way tap 0cm syringe Beehive shelf Gas syringe Goggles Water bath at 25 & 35°C 250cm beakers & thermometer for water bath Method .Weigh out 1 sample of celery extract of 10g in a conical flask. 2.Place in a water bath at 25°C. 3.Place about 20cm hydrogen peroxide solution in a container in the same water bath. 4.Leave for 10 min to equilibrate. 5.Set up the apparatus as follows: -Fill a trough with water -Fill a measuring cylinder with water and invert in the trough (ensure that no air bubbles are in the water) -Secure the cylinder with a clamp & stand -Position the bung and 3 ways tap to fit on a conical flask, ensure that this can be held in place with a clamp & stand -Put the end of the tubing in the measuring cylinder 6.Make sure that the tap is closed and fill a syringe with 10cm hydrogen peroxide from the water bath. 7.Take the first conical flask containing the celery extract; arrange the apparatus as above and empty the syringe into the flask closing the 3-way tap start the stopwatch.
Type of Ownership
Type of Business Ownership 4th October 2008 Types of ownership Sole proprietor- A sole proprietor is a single person owning a business. Sole trader have unlimited liability (all debts paid by the owner, personal possessions may be taken). Partnership- 2 - 20 partners own, control and finance the business. They have unlimited liability. In a partnership the partners need to draw up a 'Deed of Partnership' to verify their company and to describe each partner's role in the business. Private Limited Company (Ltd)- A Company owned by shareholders. A limited number of shares are issued (99); these are owned by family and friends of the business. The business has limited liability (the only money lost is the money already invested in the company such as the shares, set up cost and others. Personal belongings are safe). A lot of small businesses are private. Public Limited Company (PLC)- A Company owned by shareholders, unlimited amount of shareholders. It must have £50,000 of capital, and may allow its shares to be bought by the general public via the stock market. The business has limited liability. Every PLC must send an annual return to Companies House at least once every 12 months. Franchise- Franchising refers to the methods of practicing and using another person's philosophy of business. The franchisor grants the franchisee the right to distribute its products,
The supernatural in Macbeth
The supernatural in Macbeth The Witches, also known as the Weird Sisters, are part of the supernatural element of the play. Without them, the play would surely not have taken the path that it did for either Macbeth, nor Lady Macbeth would have been driven, by greed and lust for the crown, to the extent of murder and regicide. Although the witches only feature in a few scenes, their presence is essential and they are the characters who drive Macbeth to the position of King and eventually to his death. In the following I will assess the roles that the witch play and decide how important they actually were. Firstly, the appearance of the witches, give us a better idea of their character. They are described as having "choppy fingers, skinny lips and beards." When Banquo meets them, he says "That not look like the inhabitants o'th'Earth and yet are on it?" He says they look imaginary and when they disappear, he describes them as "bubbles of the Earth" Clearly they are going to influence Macbeth's life in a 3.major way. The witches also speak in riddles and paradoxes. They make it purposefully hard to understand the truth about what they mean. Some examples are "Fair is foul and foul is fair" (implying all good is bad and all bad is good) Another example is when a witch says, "When a battle's lost and won" Later on in the story, we realise that nearly everything the witches do
The Supernatural in "Macbeth"
Macbeth Supernatural, no matter if you believe in it or not it still attracts the audience's heart. In the time of William Shakespeare there was a strong belief in the existence of the supernatural. Thus, the supernatural is s recurring aspect in many of Mr. Shakespeare's plays. In "Macbeth", the supernatural is an integral part of the structure of the plot. Not only do witches appear but also a floating dagger transforms into reality. Shakespeare intelligently introduced the elements of the supernatural in Act 1, Scene 3. Shakespeare located his scene in a mysterious marshy, deserted "heath" on a day with "thunder", perfect for paranormal activity. Thunder and lightning was believed to be associated with evil, and when the play was presented in Shakespeare's time, cannonballs would be rolled to create the sound effect. Three characters are introduced; immediately we knew that they are involved with the supernatural because the second witch told the others that she was "killing swine". Witches tried to hide from humans in fear of being burned at stakes, so they had to be in an empty heath to meet Macbeth. Back in the day, witches were blamed for the death of animals. Also, the witches repeated phrases three times. "I'll do, I'll do, I'll do" and instead of any other number of witches, there were three of them. The number three was regarded as a magic number. The
Too Much Information: Genetic Testing
Too Much Information: Genetic Testing Biology OAC ISP Essay - By Daniel Perez Genetic testing offers a whole new world of information about us and how our bodies work. The data we get from delving into our own genetic code can help us to cure or even prevent disease, stop medical conditions such as cancer or cystic fibrosis from even manifesting, or even correct these sorts of errors before birth, and many other beneficial uses. However, at this point in time, all of this is beyond us. We have no miracle cures, no 'magic bullet' with which to fight disease or genetic conditions, in fact, our understanding of the genetic code is so limited that it's as if we cannot see the forest for the trees. We have taken our first baby steps into understanding human genetics with the completion of the Human Genome Project, and now that we have the big picture, we can begin to interpret it. Through information gleaned from our DNA, we now know that there are certain medical conditions that are caused by certain patterns within the genes. Some examples of these genetic conditions include Tay-Sach's disease, Bloom syndrome, Deafness, cystic fibrosis, and many other diseases (http://www.einstein.edu/e3front.dll?durki=7158). Although many of these conditions are fatal, the ones that are not can be treated early, even before symptoms develop when possible, or if not treated, at least monitored
Was The Treaty Of Versailles Justified?
Was The Treaty Of Versailles Justified? The Treaty Of Versailles was an agreement between 32 nations deciding the fate of Germany. It was needed badly as war torn Europe was in turmoil. France had been devastated by the effects of war and sought to cripple Germany. The British Prime Minister, Lloyd George, realised the severe implications that this could have and so wanted a more lenient peace treaty. The American public had little interest in Post War Europe but their President, Woodrow Wilson, wanted a Germany that would make a good neighbour in Europe, hence his fourteen points. To reach a compromise a meeting was needed at the small palace of Versailles, not far from the French capital, Paris. Here the leaders of 'The Big Four', Orlando, Clemenceau, Wilson and George, representing Italy, France, Britain and America respectively, tried to find a lasting peace for Europe. This meeting was intended to bring stability ad peace into a crippled Europe. The date set was June 28th, 1919 and the members of 32 nations met up, in a council of 10, to agree on terms of peace for Germany, however none of the defeated nations were present at this meeting including Russia whose Government was not acknowledged by the Allies. The treaty was to last for 12 months and was to be a long and arduous task, even impeding Wilson's health, but what was the outcome and was the treaty justified?