Essays Tagged: "Chlorine"

Water Transitions

eshwater (744Headlam).Next, there is saltwater, or seawater. Seawater consists of fifty-five percentchlorine, and thirty-one percent sodium (Groliers). It makes up approximatelyninety-seven and two te ... cent of the earth's surface (Groliers). Sea waterdoesn't just contain hydrogen, oxygen, sodium, and chlorine; it also contains everynaturally occurring element. Although seawater has a fairly constant ...

(3 pages) 55 0 4.5 Nov/1996

Subjects: Science Essays > Chemistry


romethane (CFC-12) and trichloromonoflouromethane (CFC-11). In both compounds, different amounts of chlorine and fluorine are combined with methane, which is a combination of carbon and hydrogen. Thes ... when scientists studied the decomposition of CFCs in the atmosphere. What they found was startling. Chlorine atoms are released as the CFCs decompose, thus destroying the Ozone (O3) atoms in the high ...

(5 pages) 83 0 3.4 Mar/1997

Subjects: Science Essays > Chemistry

Tjis essay explains the evolution of the atomic theory and how it has changed over the last cenutry or so.

combinein specific proportions because they are made of individual atoms. Forexample, hydrogen and chlorine always combine in a specific proportion tocreate hydrochloric acid. Dalton thought that ato ...

(2 pages) 48 1 3.0 Jun/2002

Subjects: Science Essays

Differences and Effects of Natural and Synthetic Fertilizers

pounds required for sufficient growth, such as iron, boron, manganese, copper, zinc, molybdenum and chlorine. In some cases, these nutrients are found to be missing in soils, but it is extremely uncom ...

(3 pages) 48 0 5.0 Jan/1996

Subjects: Science Essays > Biology

Ozone Depletion

damage is similar. When they inter the outer atmosphere,They react with ozone chemicals to release chlorine and bromine that in turn deteriorate the ozone and form 'thinning' or 'holes.' This is cata ... less damage (Singer and Crandall npg). Hydroflurocarbons (HFC's) are 'made with hydrogen instead of chlorine,' which doesn't contribute to the ozone problem, but is a factor to the greenhouse effect ( ...

(3 pages) 56 0 3.0 Dec/1995

Subjects: Science Essays > Environmental Science

Trench Warfare

he Germans first presented the gas attack on October 27, 1914 at Ypres. The gas attack consisted of chlorine, which would destroy eyesight, and make the victim couch out its lungs, unless the chlorine ...

(1 pages) 46 2 3.0 Dec/2002

Subjects: History Term Papers > World History > World War I

The Ozone hole,what causes the hole, what are some of the effects that it has on humans and animals,and what is being done to try in slow down the process.

and they do not dissolve in rain (Haas 2001). So, after a period of time theses CFCs, which contain Chlorine, reach the stratosphere and begin to destroy the ozone (Haas 2001).So, what are CFCs? Manma ... iety of industrial and commercial applications, but it was not until the 1970s that these and other chlorine-containing substances were suspected of having the potential to destroy atmospheric ozone ( ...

(4 pages) 65 0 4.7 Nov/2003

Subjects: Science Essays > Earth Sciences > Geography

Experiment to describe reactivity of a given set of metals.

untsSamples of: Zinc foil, Copper foil, Magnesium ribbon, Sodium and iron nails.Solutions of : Zinc chlorine, Copper chlorine, Magnesium chlorine, Sodium chlorine, Iron chlorine.Equipment : Test tubes ...

(1 pages) 30 0 3.0 Jan/2004

Subjects: Science Essays > Chemistry

Process in Water Treatment Plant

hydroxide, are formed when the coagulants combine with bacteria, mud, and silt. Coagulants such as chlorine are added to kill bacteria and viruses.As the water slowly passes into deep, broad sediment ... an sometimes get passed the purification devices, water is usually sterilized with chemical such as chlorine to ensure that it is safe to drink. At that point it only take slight amounts of chlorine t ...

(1 pages) 49 1 3.0 Apr/2004

Subjects: Science Essays > Chemistry

How is hydrogen chloride produced in industry and lab, its uses and preacautions to its hazards

say, hydrogen chloride will be researched on from the list of ammonia, sulphur dioxide and sulphur, chlorine and hydrogen chloride. The following table shows the physical and chemical properties of hy ... on way hydrogen chloride is produced in industry is by the controlled reaction between hydrogen and chlorine. The equation of the reaction is as below:H (g) + Cl (g) ============ 2HCl (g)This process ...

(3 pages) 29 0 5.0 Oct/2004

Subjects: Science Essays > Chemistry

Bond Notes

een oppositely charged ions because of electrostatic forces of attraction. example: sodium + chlorine ----> sodium chlorideIonic compound* a compound composed of ions.* Metal atoms lose elec ... " and its molecular formula is shown as H2.The halogens also exist as diatomic molecules. Fluorine, chlorine, bromine and iodine all have the same type of Lewis structure, with seven outer electrons ( ...

(4 pages) 29 0 3.0 Dec/2004

Subjects: Science Essays > Chemistry

"Respiration is very similar to burning." Is this true? Illustrate your answer by describing 3 similarities and 3 differences between the two.

urs in oxygen (in form of O2) to form oxide. However, burning can take place in other gases such as chlorine. Also both of these reactions are exothermic - both reactions release heat after reacting w ...

(2 pages) 25 0 5.0 Jan/2005

Subjects: Science Essays > Biology


fection: Boil it. Drink and brush teeth only with water that has been boiled or treated with chlorine or iodine tablets. Safe drinks include coffee and tea made with boiling water or carbonated ...

(2 pages) 25 0 3.0 Feb/2005

Subjects: Science Essays > Biology

Human body Sensory systems

stayed in my mouth longer the water started to taste less sugary. The fresh water tasted more like chlorine and dull than it usually does. Since my taste buds had adapted to the sugar in the water, w ...

(3 pages) 54 0 4.0 Mar/2005

Subjects: Social Science Essays > Psychology

Gravimetric Determination of Phosphorus in Plant Food.

udents at Harvard developed or defined many of the techniques of gravimetric analysis of silver and chlorine. These techniques were used to determine the atomic weights of 25 of the elements, decompos ...

(3 pages) 37 0 0.0 Nov/2005

Subjects: Science Essays > Chemistry

Chlorine: Biography and the Dangers Related.

Chlorine is a highly toxic, yellow-green gas. Because of its reactivity, chlorine does not exist in ... nature, although it is widely distributed in combinations with other elements.The atomic weight of chlorine is 35.45, and its atomic number on the periodic table is 17. Related compounds to chlorine ... arbon, hydrochloric acid, perchlorciethylene, and trichlorethylene. It also has a bad smelling odor.Chlorine was discovered in 1774 by the action of manganese dioxide on hydrochloric acid. It is made ...

(2 pages) 40 0 4.0 Dec/2005

Subjects: Science Essays > Chemistry

Water Purification

nst drought. This may take from several days to as long as a few months. After storage, the water's chlorine and salt levels are regulated using chlorine and soda ash respectively.The second step, as ... the previous steps, sediments were removed, however in this step bacterium and germs are destroyed. Chlorine is mainly used to destroy these pathogens; however ozone is also used as a powerful cleanse ...

(1 pages) 17 1 4.5 Nov/2006

Subjects: Science Essays > Chemistry

Sodium Hydroxide - Production

ium Hydroxide on organic materials is the main principle behind drain cleaners.Chemical Production: Chlorine and sodium Hydroxide are both manufactured by the electrolysis of brine (aqueous sodium chl ... acr;(aq) + 2 H2O (l)>>> Cl2 (g) + H2 (g) + 2 Na+(aq) + 2 OH¯(aq) During electrolysis, chlorine is formed at the anode, whilst hydrogen and hydroxide ions are formed at the cathode i.e. 2 ...

(2 pages) 19 0 5.0 Sep/2001

Subjects: Science Essays > Chemistry

Ozone Depletion

leased on the surface of the earth and travel up into the atmosphere. Ultra violet light causes the chlorine to break down the ozone molecules which causes the holes in the ozone layer. This type of i ...

(1 pages) 10 0 3.0 Dec/2001

Subjects: Science Essays > Environmental Science

Will Anti Acids Affect Soils Polluted By Acid Rain?

ls to undo what other chemicals have already done. Acid rain is formed by carbon dioxide and chlorine. They both dissolve and form carbonic acid and hydrochloric acid. The most common of acid r ...

(2 pages) 7 0 0.0 Jan/2002

Subjects: Science Essays > Environmental Science