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Chemistry Essays

Result for Subject Chemistry:
1168 essays
The History of DDT Chemistry Essay
5 pages (1250 words) , Download 2 , Essay
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In 1962, just 14 years after Paul Hermann received the Noble prize for his discovery of the "high efficiency of DDT as a contact poison against several arthropods", author and environmentalist Rachel Carson alerted the American public to the irreversible chain of evil introduced by the notorious pesticide.
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Therapeutic Polysaccharides Chemistry Essay
8 pages (2000 words) , Download 2 , Essay
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The author explains that on a fundamental level, polyssarcharides are defined as polymeric chains composed of mono- or di-saccharides bound together by glycosidic bonds, a special type of covalent bond.  Carbohydrates possess a hemiacetal group that contains a reactive anomeric carbon that readily reacts in certain low pH cellular environments.
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How much Gas is Preduced Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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If it so happens, that in a chemical reaction one or more reactants or products are gases, gas laws must be considered for the calculation. The Ideal Gas Law states that; where P is the pressure (in atm), V is the volume (in Q), n
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Inhalants Toluene Chemistry Research Paper
10 pages (2710 words) , Download 2 , Research Paper
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Toluene is a clear, insoluble liquid. It is a substituted benzene derivative. It is an aromatic hydrocarbon commonly used for livestock and as a solvent. To test the presence of Toluene, different analytical methods are used, to identify and quantify the presence of Toluene. This paper discusses three analytical methods that can be used to test the presence of toluene in any substance.
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Thermochemistry Hess' law Chemistry Lab Report
5 pages (1250 words) , Download 2 , Lab Report
Reaction one involved dissolving of sodium hydroxide in water; Reaction 2 involved reaction between sodium hydroxide and dilute hydrochloric acid; reaction 3 involved reaction between sodium hydroxide and hydrochloric acid solution. The use of Styrofoam
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Diesel Particulate Matter Chemistry Assignment
6 pages (1750 words) , Download 2 , Assignment
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The inhaled substance usually accumulates in the lungs. Some of the substances stored in the lungs can be absorbed into the blood. Long-term exposure to the substance may lead to its accumulation in the blood. Some of the substances may accumulate in the kidneys, especially those that reach the body through ingestion.
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The Kinetics of a Diffusion-Controlled Reaction Chemistry Lab Report
2 pages (756 words) , Download 2 , Lab Report
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A bimolecular reaction is a reaction that occurs mechanistically as A + B products, with a mechanistic rate = k [A][B] (Wright 184). For reactions occurring in solutions, the solvent exerts an effect as a consequence of it being a condensed phase, with its molecules very close together even in the case of a chemically inert medium.  
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Organic Chemistry: Polymers Chemistry Research Paper
8 pages (2917 words) , Download 2 , Research Paper
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Although many people of polymers as mere plastics used in making household objects and packaging, polymers have a variety of applications in everyday life. Polymers and composites, i.e., materials that result from a combination of more than two materials, are essential to the modern dentistry industry.
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Should Ethanol Be Required in Gasoline Chemistry Annotated Bibliography
2 pages (513 words) , Download 3 , Annotated Bibliography
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This article was initially appeared in the Chicago Sun-Times on January 27, 2007. It was written by Jerry Taylor and Peter Van Doren. This article mostly argues against the usage of ethanol in gasoline. It tries to discard some of the prominent claims of the advantages of ethanol in gasoline, with the help of quoting the opinions of experts and scientific studies.
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Cellular Respiration Chemistry Essay
1 pages (475 words) , Download 5 , Essay
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Anaerobic metabolism is more energy efficient because it helps in consuming the less useful carbon dioxide gas from the atmosphere. Two ATP are produced at glycolysis stage a process known as substrate-level phosphorylation. When fermentation occurs in a sealed container, it means that there is no supply of oxygen and the process will be anaerobic. 
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Benzene - Properties, Uses and Hazards Chemistry Essay
2 pages (723 words) , Download 6 , Essay
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This paper discusses some of the physical and chemical properties of benzene, its uses, and hazards. Benzene is a nonpolar molecule with a molecular weight of 78.11 g/mole.  It is also known as benzol and mineral naphtha, and has a chemical reference number (CAS) of 71-43-2 (dhs.wisconsin.gov, 2013). 
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Chemometric Techniques Chemistry Assignment
6 pages (1879 words) , Download 2 , Assignment
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They are known to have a difference in pharmacological activities. They are also known to be similar in terms of morphology, hence normally classified by experts or herb farmers. This process needs a long term experience and it is based on the judgment. Furthermore, they tend to be fragile as well as very hard to be differentiated.
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Glutamic Acid as an Excitatory Neurotransmitter Chemistry Assignment
1 pages (301 words) , Download 3 , Assignment
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It plays its role by opening sodium Na and potassium K channels. Upon its release, glutamate is conveyed from the synaptic cleft either to adjacent neurons or into the nearby glial cells. Those neurons that produce glutamate at their Synaptics are called glutamatergic. The principal effect of glutamate is fast excitation.
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Effects Of Hazardous Materials On Fire Service Chemistry Essay
6 pages (1649 words) , Download 2 , Essay
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Evacuate means to move all people from the endangered area to a protected place. Thirdly managing the people evacuated to a safer place. This procedure is called in place protection. In place, security means to direct people to rapidly go inside a building and stay inside until the risk passes.
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Use your understanding of chemistry to answer the following questions Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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In effect, this evaporation of the water due to a humid atmospheric temperature cools me down. Sweating is basically our body’s internal cooling system and can be likened to a car’s radiator which cools the engine when it
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Lewis acid catalysts, eg. Fe3+, Ru3+, Zn2+, etc., for certain organic transformations Chemistry Thesis Proposal
3 pages (750 words) , Download 2 , Thesis Proposal
The Lewis acid role in the reaction is critical as it determines the general reaction pathway by controlling the production and trapping of the intermediate cationic specie. In cases when the
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Preparation of Cyclohexene from Cyclohexanol Using Exothermic Reactions Chemistry Essay
5 pages (1354 words) , Download 3 , Essay
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Cyclohexanol is a secondary alcohol that undergoes dehydration by an E1 mechanism. This molecule is related to cyclohexane with the replacement of one hydrogen atom of a hydroxyl group. The major intermediate of this mechanism is a cyclohexyl cation, which can undergo both substitution and elimination. 
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Chemical reaction paper Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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The bleaching effect is achieved through oxidation or reduction process. The most commonly used bleach agents made of chlorine compounds decolorizes by oxidation. Oxidation refers to the process whereby the compound removes oxygen from one compound or
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The Poisoning Needle Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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There birds fed on small fish and bred on the shores. This behavior of the birds was unanticipated and instigated a wave of curiosity in the scientists and researchers. About two and a half decades later, in
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Phosphoric Acid Fuel Cell Chemistry Essay
4 pages (1112 words) , Download 3 , Essay
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The electrolyte in these cells is a concentrated solution of potassium hydroxide and sodium hydroxide (Onovwiona and Urgusal 384). It fills the space between the electrodes. Hydrogen gas and oxygen gas are simmered using porous electrodes, and the overall cell reaction involves a combination of hydrogen and oxygen gases from water.
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Industrial production of aluminium from bauxite and recycling Chemistry Essay
5 pages (1250 words) , Download 2 , Essay
Over a long period, the process of aluminum manufacture involved a cumbersome process that required lot of energy. The last century has however realized a tremendous turn around in this matter as today new
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Tetracycline Antibiotics Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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In the current world, there are many different types of tetracycline antibiotics that are widely used. Tetracycline antibiotics were obtained after the systematic screening of soil. They are broad spectrum in action and are effective against a number of gram-positive, gram-negative bacteria, rickettsiae, and Chlamydia.
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Natural/Treated Water Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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The elimination of any of the above conditions will result to no corrosion. Water corrosion is one of the common types of corrosion. At normal atmospheric temperatures the moisture from the air is just enough
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Glasses and Amorphous Materials by J. Zarzycki Chemistry Article
2 pages (630 words) , Download 3 , Article
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The author states that amorphous materials are usually prepared by the rapid cooling process of molten material. The cooling process reduces the movement of the molecules of the materials before they are arranged in a thermodynamic crystalline state. Amorphous materials may also be prepared by additives that tend to interfere with the primary constituent.
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Batch Distillation Column Chemistry Essay
2 pages (594 words) , Download 3 , Essay
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In particular, the mole fraction of methanol in the mixture is provided. The vapor and the liquid flowing above the tray are indicated by V and L respectively. The operating line represents the combined mass and energy balances, as they occur in the rectifying section of the column. The above equations are applicable only when i = 1, 2, 3,..., n. 
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Physical Chemistry Chemistry Lab Report
9 pages (2325 words) , Download 2 , Lab Report
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Brass is a widely used alloy comprising mainly copper and zinc. In an effort to enhance certain properties of the brass alloy, traces of metals like lead are occasionally added. Technically, the incorporation of lead into the brass increases the mechanical properties of the alloy. On the other hand, a substantial concentration of copper imparts germicidal and properties into the brass alloy.
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Spectroscopy Method Utilized in the Lab Chemistry Essay
2 pages (579 words) , Download 2 , Essay
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Prior to working on the lab experiment, various perceptions should be comprehended such as the spectroscopy method utilized in the lab. A calorimeter as also known as a spectrometer is a tool that is used in figuring out the quantity of light that a given solution absorbs while using various wavelengths (λ).
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Respective Properties of Macromolecules and Enzymes Chemistry Research Paper
7 pages (1822 words) , Download 2 , Research Paper
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Visual observation of simply adding a few drops of salad oil in water shows that oil is less dense than water and is immiscible. The enzyme reaction was studied using the enzymes Tyrosinase and Sucrase. The effect of different physical parameters including temperature, enzyme concentration, and pH was determined for the enzyme tyrosinase.
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Decomposition of Ammonium Compound Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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Ammonium compounds are identified by an ammonium ion in their composition. They quickly lose stability when exposed to heat, hence decompose in two ways. One of them is the decomposition of the ammonium compound into its respective initial compounds that were used to form it. Only simple compounds of ammonia that are regarded as less hazardous.
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Evaluation of L-Proline as a Catalyst for an Asymmetric Aldol Reaction Chemistry Lab Report
1 pages (250 words) , Download 3 , Lab Report
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60mg of 4-nitrobenzaldehyde were then added to the solution and thoroughly stirred for further 30 minutes. After the reaction was complete, 5mL of saturate
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Physiological Effects of Ingested Fluoride as a Public Health Intervention Chemistry Literature review
8 pages (2269 words) , Download 2 , Literature review
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Authors of the article “Water Fluoridation: A Critical Review of the Physiological Effects of Ingested Fluoride as a Public Health Intervention”, have applied present indefinite tense and present perfect tense throughout the article; for example ― “Fluorine is the world’s 13th most abundant element and constitutes 0.08% of the Earth crust".
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Application of Le Chatelier's Principle and Catalysis Chemistry Lab Report
8 pages (2290 words) , Download 3 , Lab Report
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Generally, it is quite essential to state that special emphasis was given to the application of catalysis and Le Chatelier's principles. While all processes were designed to increase the yields, at times some of the principles were compromised for other considerations such as improving the reaction rate.
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Ways in Which Wasted Solution Could Be Recycled Chemistry Lab Report
1 pages (250 words) , Download 3 , Lab Report
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The results obtained from the experiment would be used by the waste disposal company to find an alternative use to waste solutions instead of disposing of them. The company believed that it was possible to use the waste solutions to make valuable solids and use this as an avenue for increasing the profitability of the company. 
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Mass Spectrometer Design Chemistry Essay
14 pages (1403 words) , Download 2 , Essay
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Basically, a mass spectrometer performs three important roles. Initially, it bombards the molecules to be analyzed with a stream of high-energy electrons, transforming a number of the molecules to ions, which are then fast-tracked in an electric field by a sequence of polarized fast-tracking plates, a huge potential difference (p.d), oscillating from 1 to 10 kV.
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Potential Harm from Halon Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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Generally, according to the Material Safety Data Sheet of a fire extinguisher with recycled Halon 1301 and Methanol, human hazards include asphyxiation or suffocation due to lack of oxygen. Personnel who would be inhaling this toxicant will breathe heavier as well as this gas is much heavier than air.
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Drilling Problems and Drilling Operations Chemistry Essay
1 pages (322 words) , Download 2 , Essay
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The water or oil flowing into the well gets mixed up with the drilling mud and makes it lighter exerting less pressure on the bottom. The blowout preventers are used to close the hole and stop the Kick. The drilling mud is constantly monitored for its weight, electrical resistivity, or temperature to know if fluid is being cut by subsurface fluids.
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Proton Exchange Membrane Fuel Cells Chemistry Essay
19 pages (5846 words) , Download 2 , Essay
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A major factor that has impacted ob the invention of fuel cells is an environmental concern. Important to note is the growing concern for a better and safer environment for human health. In this circumstance, the development of fuel cells helps in reducing dependence on fossil fuels hence reducing the levels of toxic and poisonous emissions to the atmosphere. 
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Microbial Production of Non-Beta Lactam Antibiotics Chemistry Assignment
13 pages (3738 words) , Download 2 , Assignment
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The first tetracycline-resistant bacterium, Shigelladysenteriae, was isolated in 1953. Tetracycline resistance now occurs in an increasing number of pathogenic, opportunistic, and commensal bacteria. The presence of tetracycline-resistant pathogens limits the use of these agents in the treatment of disease.
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Hydroboration-Oxidation of (1R)-(+)-aplha-Pinene Chemistry Lab Report
2 pages (500 words) , Download 5 , Lab Report
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The resultant solution was then cooled in an ice-bath, followed by the oxidation reaction. The oxidation reaction was performed by adding water, petroleum ether and HCL bit by bit, each time removing the aqueous
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Advantages and Disadvantages of Presumptive Test Chemistry Essay
2 pages (500 words) , Download 86 , Essay
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The author of the essay explains the presumptive test, a method that Forensic Drug Testing uses to analyze and determine drugs and other substances with unknown characteristics. Forensic Drug Testing uses presumptive tests alongside confirmatory tests to analyze the unknown substance and determine its identity.
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Posttranslational Modifications Chemistry Essay
3 pages (808 words) , Download 3 , Essay
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The author states that the process of translation is followed by numerous modifications in the covalent bonds leading to the alteration in the properties of proteins; such alterations are known as post-translational modifications. The process involves either an addition of a transforming group to one of the amino acids of the polypeptide chain.
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Biochemistry Final Project part 1 Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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During the active phase of the condition, the patient, who were otherwise healthy, presents with psychotic symptoms. Some of these include auditory hallucinations, disturbance in the way of thinking, social withdrawal, unusual behavior/speech and delusions.
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Determining Connection between Mothers New Job and the Childs Illness Chemistry Case Study
1 pages (490 words) , Download 2 , Case Study
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I would look for symptoms of the child’s illness. With the permission of the co-worker, I would request to assess the symptoms of the other child, who had allegedly suffered the same disease. In the case that the symptoms are similar, I would request for test indicating the specific illness of the two children and find out their causes.
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Factors that Affect the Intensity of Color Chemistry Lab Report
1 pages (285 words) , Download 2 , Lab Report
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It was observed that different colors transmitted light at varying wavelengths. For example, the blue solutions transmitted light at 430 nanometers, whereas blue-green transmitted at 470 nm. On the other hand, the green color transmitted light at 564 nm while the red color transmitted light at 635 nm. 
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Techniques of Organic Chemistry Chemistry Lab Report
1 pages (296 words) , Download 4 , Lab Report
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The dehydrating agent was to remove the OH group from the cyclohexanol leading to the formation of cation as the intermediate product and thereafter remove a hydrogen atom from the cation resulting in the formation of cyclohexene. The mixture of approximately 10g of cyclohexanol, 3 mL of 85% phosphoric acid and 1-2 boiling chips was put inside the distillation flask.
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Interactions of hazardous materials Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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Long time exposure to radiation may have long term effects such as development of leukemia and cancer. Damage to human DNA causes reproductive effects such as giving birth to deformed children. High exposure to radiation kills. Roentgen (rem) is a unit used to
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Flow-sheet N-Propanol Chemistry Essay
1 pages (250 words) , Download 3 , Essay
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This generates propane that goes through reaction with propionic bacteria. Propane thus generated propanol. We use 2-Aminopropan-1-ol in the processes labeled V1 to V7
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Lab practical - report & questions sheet Chemistry Lab Report
1 pages (250 words) , Download 2 , Lab Report
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The titration required 13.65 mL of the sodium hydroxide to reach the endpoint. Determine the concentration of the unknown acid solution. An analogous
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The Issue of Safe Chemicals Act Chemistry Essay
9 pages (2250 words) , Download 2 , Essay
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It is a paradox that however useful, some of these chemicals negatively the environment and affect human health. Ergo, they need to be properly regulated and monitored in order to address health and safety risks. Congressional interest in revising chemical control laws has heightened in recent years.
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Diels-Alder Reaction Chemistry Lab Report
2 pages (500 words) , Download 7 , Lab Report
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The prevailing products of the reaction will be stored in the laboratory drawer while obtaining characterization data. Characterization data entail melting point, carbon
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