Essays Tagged: "impurities"

Fractional Distillation and Gas Chromatography

simple distillation, the liquids being separated boil below 150 0C at 1 atmosphere from nonvolatile impurities and another liquid that boils at least 25 0C higher than the first. A solution is heated ...

(8 pages) 103 0 3.5 Jun/2002

Subjects: Science Essays > Chemistry


rification process. In this form, silicon is the purist industrialsubstance that man produces, with impurities comprising less than one part ina billion. That is the equivalent of one tennis ball in a ...

(5 pages) 91 0 4.0 Feb/1996

Subjects: Science Essays > Chemistry

Contents of different liquors

particular to different types and brands. These unique flavors are the result of trace amounts of "impurities" in the liquor. Sometimes producers intentionally add characteristic "impurities" to "tag ... limestone cave spring water, the charcoal "mellowing", and the oak barrel aging contributes unique "impurities" to the final product which we perceive as a characteristic flavor ( ...

(4 pages) 48 0 3.7 Dec/2003

Subjects: Science Essays > Chemistry

Essay Topic : Fear was demonstrated through the words and actions of groups of characters in the chrysalids(a book) by John Wyndham (author).

sly strived to become purer and purer. They feared deviations because deviations were considered as impurities sent by the devil. This could be verified when the inspector said "The Devil sends deviat ...

(3 pages) 50 0 4.0 Dec/2003

Subjects: Literature Research Papers > North American

Diabetes Types 1 and 2 thoroughly explained

ause it cannot enter the cells. When the blood passes through the kidneys, organs that remove blood impurities, the kidneys cannot absorb all of the excess glucose. This excess glucose spills into the ...

(5 pages) 193 0 3.0 Jan/2004

Subjects: Humanities Essays > Health & Medicine > Diseases

GCSE Physics Coursework - Resistance of a Wire Coursework Resistance of a Wire

ollisions between the free electrons and the fixed particles of the metal, other free electrons and impurities. These collisions convert some of the energy that the free electrons are carrying into he ... e free electrons will collide with other free electrons, the particles making up the metal, and any impurities in the metal. Therefore, more energy is going to be lost in these collisions (as heat).Fu ...

(6 pages) 141 0 3.3 Jan/2004

Subjects: Science Essays > Physics

Diamond Mining and Uses

lry industry. Though expensive, they can be obtained synthetically for a much cheaper price without impurities and are mined most exclusively in South Africa, Russia, Congo, Botswana, and Australia. I ... ve unsuitable structures, it is often cheaper to create synthetic, monocrystalline diamonds without impurities. These can be created by using anvils to add pressure to graphite disks and a number of s ...

(4 pages) 57 0 3.0 Jan/2004

Subjects: Science Essays > Earth Sciences > Geology & Geosciences

About the hidden impurities of the industrial revolution

Impurities of the Industrial revolutionThe industrial revolution was absolutely beneficial towards p ... ever, the Industrial revolution was also commonly known as the "Gilded Age", due to the many hidden impurities. This period underwent not only an industrial revolution, but also affected the social, p ...

(2 pages) 41 1 3.7 Feb/2004

Subjects: History Term Papers

Holocaust and its non-Jewish Victims

itler, and other high-ranking Nazi officials, began a "euthanasia" program to rid Germany of these "impurities". They felt that these people were useless and therefore implemented a series of "mercy k ...

(3 pages) 148 8 4.8 May/2004

Subjects: History Term Papers > European History > German History

Physics coursework - Resistance of a wire

ollisions between the free electrons and the fixed particles of the metal, other free electrons and impurities. These collisions convert some of the energy that the free electrons are carrying into he ... e free electrons will collide with other free electrons, the particles making up the metal, and any impurities in the metal. Therefore, more energy is going to be lost in these collisions (as heat).&m ...

(3 pages) 42 0 3.0 Jul/2004

Subjects: Science Essays > Physics

Perrier Recall.

examine a crisis issue, initially raised in the U.S., concerning the revealed carcinogenic benzene impurities in the famous Perrier bottled water.In the growing U.S. bottled water market, Perrier is ... ressing that there is no impurity in the Perrier spring water and tests show that traces of benzene impurities are at levels representing no hazard to health.* Mar 7, 1990: Perrier Group of America pl ...

(3 pages) 34 0 4.3 Nov/2005

Subjects: Businesss Research Papers > Case Studies

Aluminum and its properties.

s as a result of their high strength to weight ratio. Aluminum's strength is increased when certain impurities are added to form different alloys. Certain alloys like aluminum wrought 2024 have high s ... lite is a mixture of aluminum, sodium, and calcium fluorides. Then you have metal aluminum free of impurities.(Wikipedia)

(3 pages) 39 0 3.4 Dec/2005

Subjects: Science Essays > Chemistry

The Effects of Puritanism and the Great Awakening Upon American Society

hared a common Calvinist theology" (Heyrman, 2002). Their opposition to the Anglican Church and its impurities, eventually led to their dispersal into the American colonies, where they established the ...

(4 pages) 81 0 5.0 Mar/2006

Subjects: History Term Papers > North American History


t plate once the hot water was added to keep it hot.Decolorizing charcoal was added because colored impurities were present.The hot solution was filtered through the fluted filter paper into the heate ... es not react with benzoic acid. At the same time, water is also a good solvent for the benzoic acid impurities at both high and low temperatures.The second step is to dissolve the sample in the minimu ...

(5 pages) 46 0 4.2 Mar/2006

Subjects: Science Essays > Chemistry

Genetically Modified Food

redients and usually without even noticing ourself. This all turns down because of pesticide, added impurities used to kill pests, diseases, especially insects which are on the land or property. The g ...

(3 pages) 105 0 3.7 Apr/2006

Subjects: Science Essays > Agriculture

Inorganic and Organic Chemistry(CP4006) - Preparation and Recrystallisation of Aspirin

ng obtained the crude aspirin which was still impure, recrystallisation was conducted to remove the impurities.The aspirin harvested at the end of the experiment was 1.19g with the percentage yield of ... llisation.Having filtered, cold water was used to wash the crude aspirin to isolate the most of the impurities leaving the crude product and pure solvent on the filter paper.Then, the crude aspirin is ...

(7 pages) 128 0 4.2 Jul/2006

Subjects: Science Essays > Chemistry

Examine Miller's "The Crucible" presentation of John and Elizabeth Proctor's relationship in Act Two (to the top of p46 when Mary Warren enters).

A crucible is a container in which metals are heated to extract pure elements from impurities. This reflects the story as it portrays John Proctor and the citizens of Salem, as in the ...

(6 pages) 11 0 0.0 Nov/2006

Subjects: Literature Research Papers > North American

Melting point lab

ompounds that are synthesized in labs or isolated from natural recourses often have been tainted by impurities. Recrystallization is a process that removes these impurities from solid organic compound ... stirring, bring the solution to a gentle boil for 1 - 3 minutes to remove small amounts of colored impurities. Meanwhile, prepare the short stem plastic powder funnel, a piece of fluted filter paper, ...

(5 pages) 29 0 0.0 Feb/2007

Subjects: Science Essays > Chemistry

"Hamlet's First Important Soliloquy"

igion nor his family can provide any comfort to him.Hamlet desires to wipe himself clean of all the impurities than he can see around him by suicide, however he realizes that by killing himself, he wo ...

(1 pages) 522 0 0.0 Nov/2001

Subjects: Literature Research Papers

Chemical Processes - Iron Ore, Pig Iron, Wrought Iron and Steels

s used to create wrought iron. These processes rely heavily on oxidation to remove carbon and other impurities. In both steel and wrought iron production processes however, iron ores must be converted ... ulting product from the blast furnace is molten pig iron and slag. The slag is a combination of all impurities removed by the limestone in the reaction and can be removed simply by tapping it off as i ...

(10 pages) 16 0 3.7 Nov/2007

Subjects: Science Essays > Chemistry