Free Chemistry Essay Examples and Topics | Page 13

The benefits and harmful of plastic Chemistry Essay

4 pages (1000 words) , Download 2 , Essay

This negative side pertains to its usage, its disposing off and other associated factors. The following are few of the positive and negative sides of plastic baggage usage. Its positives can be proven

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Chemistry of Alkenes Chemistry Lab Report

2 pages (500 words) , Download 2 , Lab Report

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This was shown when a green flame appeared using the Belstein test, indicating the presence of unreacted alkyl halide. The presence of the C-Cl stretch in the FTIR spectrum of the product also indicated the presence of

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Undergrad research (Sonicator) Chemistry Research Paper

2 pages (500 words) , Download 3 , Research Paper

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Ultrasound refers to sound waves that have higher frequencies in comparison to the human ear. Ultrasound usage is divided into two including the high frequency and low

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Biotechnology Company Chemistry Essay

1 pages (250 words) , Download 2 , Essay

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Therefore, it rids the environment of methane, which is among the major gases that are significant for global warming via greenhouse effect (Khalil 34). The company’s name is yet to be determined. It is a relatively young company with a bright

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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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Relationship between Pressure, Temperature, Volume, and the amount of Gas Occupying an Enclosed Room Chemistry Essay

2 pages (529 words) , Download 3 , Essay

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From figure 1, it has been seen that the volume is directly proportional to temperature at constant pressure. From figure 2 it is observed that the volume is directly proportional to temperature and from Figures 3 and 4 it is observed that the volume is inversely proportional to pressure. All these are the ideas behind the ideal gas law.

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Cystic Fibrosis and Genetic Mutation Chemistry Essay

1 pages (306 words) , Download 4 , Essay

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The protein called the cystic fibrosis transmembrane conductance regulator (CFTR) influences the transport of chloride and the abnormality is found in the DNA of the related cells. The AF508 mutation that is what it is called as deletes three nucleotides or DNA building blocks from the gene.

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Molecular Fluorescence Analysis of Proteins Chemistry Lab Report

4 pages (1000 words) , Download 2 , Lab Report

Fluorescence occurs when an excited molecule goes back to the ground state by photon emanation. Conversely, phosphorescence occurs when the excited electron

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The Concentration of Potassium Hydrogen Phthalate Chemistry Essay

4 pages (1098 words) , Download 2 , Essay

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The level of concentration can be identified as the volume and molarity of the sulfuric acid are known. As far as the average molarity of the sulfuric acid driven from the trials is concerned, it was 0.535 M. The percentage error of 5% to 9% shows that calculations were accurate, as well as precise.

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Measuring The Heat of Decomposition of Hydrogen Peroxide Chemistry Lab Report

5 pages (1250 words) , Download 2 , Lab Report

By measuring how the temperature changes when H2O2 and a catalyst are mixed, it is possible to determine the enthalpy of decomposition H2O2. This experiment will determine the enthalpy of decomposition of H2O2 when it is mixed with potassium

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Industrial Haygene Chemistry Lab Report

2 pages (500 words) , Download 2 , Lab Report

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Early detectors were more qualitative than quantitative. Detector tubes that provide precision, accuracy and selectively are required. Dragger tubes have been made with the capacity to measure more than 300 gases and vapors (Drager 20). The draeger tube

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Fine Chemical Production Chemistry Essay

6 pages (1646 words) , Download 2 , Essay

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The chemical compound is less dense than water, insoluble in water but soluble in diethyl ether, ethanol, and mineral oil. In addition, as an aldehyde, citral is normally involved in polymerization and self-condensation reactions. Chemically, citral consists of a mixture of a pair of aldehydes (terpenoids) having similar molecular formula but different structures.

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Flow-sheet N-Propanol Chemistry 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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Introduction How does money become contaminated with cocaine Chemistry Essay

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“Both may contribute ... [but] it seems clear that the banknotes containing 1,240 micrograms of cocaine were used directly during a drug deal or uptake [drug use]” (Zuo cited in Biello, 2009). Owing

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The Electronic Structure of Atoms Chemistry Assignment

2 pages (500 words) , Download 2 , Assignment

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Spin quantum number ‘ms’ is related to spin of the electron that can be either clockwise or anticlockwise. Its value is +1/2 or -1/2 (Quantum Numbers and Electron Configurations, 2014). Aufbau is a German word that means

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DTERMINTION OF TOTAL CALCIUM AND MAGNESIUM ION CONCENTRATION AND DETER MENTION OF NITRATE BY SPECTOHOTOMETR Chemistry Lab Report

4 pages (1000 words) , Download 3 , Lab Report

This result is the moles of Ca 2+ and Mg 2+ in the sample solution. Determining the total amount of calcium and magnesium ions can be

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Written Report for Professor in Chem Department (new gas-phase ion chemistry and mass spectrometric ) Chemistry Essay

4 pages (1000 words) , Download 2 , Essay

iving Bachelor of Science in chemistry from Lanzhou University in 1999 and subsequent master’s degree in organic chemistry from Shanghai Institute of Material Medica Chinese Academy of Sciences, she moved to Purdue in 2002. Here she joined professor Scott McLuckey’s research

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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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The Chemical Detection of Cocaine-Contaminated Currency Chemistry Essay

1 pages (250 words) , Download 2 , Essay

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In this case, the intricate mixture is made up of the currency paper and cocaine. The main shortcoming of this great method is that it alone cannot recognize what the separated compounds

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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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Protective equipment Chemistry Essay

4 pages (1000 words) , Download 3 , Essay

d). This reactive property of chemicals is employed in a wide range of industries such as food production, material production, pharmaceutical, and others. Conventionally, many such industries do not always categorize the unique behaviour of

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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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Answer question Chemistry Coursework

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Poor hygiene affects the Tuna during preparation where the contamination all begins. During preparation of the mayonnaise to make the tuna sandwiches, with poor hygiene of the Café the

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The Concentration of Solutes Present in the Substances Chemistry Essay

3 pages (814 words) , Download 2 , Essay

The units used for the measurement of concentration are units of molarity (M) and (mol/L). To understand the significance of molarity and understand concentration, it was important to make four solutions from one sample during the experiment. Spec 20 was used in the experiment to calculate the absorbance because it can absorb light very well.

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SOP of Nitrogen Purging of the Agilent Carey 5000 UV-Vis NIR Spectrophotometer Chemistry Research Paper

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ns are meant to ensure: health of the operators is not put at any risk and that they have adequate knowledge to undertake the process; procedures go on in a systematic manner without failures. (Mannan, 2005) The scope of this Sop covers the Nitrogen purging of the Agilent Cary

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Diesel Particulate Matter Chemistry 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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Artificial Hip Replacement Chemistry Case Study

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Interference with normal body functions – the compatibility issues of the joint commonly relate to the functional capacity of the material about other body parts. Some materials commonly might produce substances that have negative effects on the functioning of other parts. Such materials become considered inappropriate for use in joints.

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Scientific Literature Workshop Chemistry Assignment

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Some of the common problems include misdiagnosis because of disparate clinical presentation. The aggressive diagnosis is necessary in averting these mistakes in adopting an effective intervention. 2. Schmitt,

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Spectroscopy Chemistry Lab Report

3 pages (750 words) , Download 2 , Lab Report

According to Lardan H. understanding ‘Series of waves converges to series limit at an air wavelength of 364.60 mm …’ (Lardan, 1998, pp. 49 -53) clearly reveals that the

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Assignment for biochemistry Chemistry Assignment

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The chemical reactions that release energy are more likely to occur than those that absorb energy. This is because fixing energy in the constituent macroscopic parts of the

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Candy Bar Density Lab Chemistry Essay

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Buoyancy is the property of an object that keeps it floating instead of sinking. Buoyancy and density are closely related to each other as density is the property of an object that enables it to float. If the object has a fairly large volume concerning its mass, it will have less density which enables the object to float over water.

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Water of Hydration in the Reagent Chemistry Lab Report

1 pages (361 words) , Download 4 , Lab Report

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The more cycles in which the results were sorted, the more accurate the results would be as they would get the most highly reliable figure. For the first cycle, the mass of the water alone is the mass of the crucible lid and hydrate, less the mass of the crucible lid and residue after heating. That gives 22.678 – 22.460 = 0.218.

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Distillation and Gas Chromatography: Separation of Hexanes and Toluene Chemistry Lab Report

4 pages (1000 words) , Download 2 , Lab Report

The methods utilized in the experiment involved precise raising and falling of temperatures at specific temperature ranges to obtain three

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Propylene Glycol Chemistry Assignment

8 pages (2000 words) , Download 2 , Assignment

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According to the report, the propylene glycol (PG) is a clear, colorless and viscous, liquid. It almost has no odor, has a little bittersweet taste, and low vapor pressure. This compound is the part of the propylene glycol family, which includes propylene glycol itself (PG), dipropylene glycol (DPG), and tri-propylene glycol (TPG).

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Physiological Effects of Ingested Fluoride as a Public Health Intervention Chemistry 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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Personal profile about Roger Tsien who is biochemist Chemistry Essay

5 pages (1250 words) , Download 2 , Essay

nature of biological molecules found in the cellular level, the task of studying cells even with the use of microscopes is a tedious task because of the tedious differentiation of biological molecules from each other. Biosensors have been a boon for scientists as they have

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Article Review Chemistry Book Report/Review

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Lead is known to be a health hazard for all humans. And it cannot be seen or smelled neither can it be tasted. Human beings are surrounded by lead within the environment, but this does not implicate that

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The Effect of Formaldehyde Inhalation Chemistry Research Paper

1 pages (321 words) , Download 2 , Research Paper

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A study by the authors on the effects of the substance on the liver was done, experimenting on rats. In the study, using 18 albino rats for a divergent period of three groups indicated that the substance affects the liver in various ways. There were histopathological changes that indicated destroyed liver tissues.

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Water: An Overlooked Essential Nutrient Chemistry Assignment

2 pages (694 words) , Download 5 , Assignment

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Water is the only substance that can be taken by both active and inactive persons, it is one of the few things needed by the body as the body cannot do without, Gatorade and Powerade are not as essential as water is to the body water is the best choice to invest in as it is timeless and will always be a basic need required by the human body.

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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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Incorporation of Lead in Blood and Body, Leading to Lead Poisoning Chemistry Assignment

1 pages (278 words) , Download 3 , Assignment

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Lead is still widely used for car batteries, pigments, ammunition, cable sheathing, weights for lifting, weight belts for diving, lead crystal glass, radiation protection and in some solders. It is often used to store corrosive liquids.

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Stereolithography and Photo Polymerisation Chemistry Essay

6 pages (1764 words) , Download 2 , Essay

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This is facilitated by a combination of software technologies, a combination of laser and photochemistry. Stereolithography is preferred by many engineers and manufacturers due to the various advantages associated with its use. Some of the advantages associated with Stereolithography include its low costs, production of durable objects, efficiency, and high precision.

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Biopolymers and Their Application Chemistry Research Paper

2 pages (964 words) , Download 4 , Research Paper

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The term ‘biodegradable’ is often applied to such materials. The main difference is that biodegradable material is destroyed in natural conditions due to the action of microorganisms, sunlight, temperature, moisture, and oxygen. Most of the biopolymers (but not all) and some polymers obtained from fossil fuels are biodegradable.

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Ionic Equilibria Chemistry Lab Report

5 pages (1508 words) , Download 3 , Lab Report

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Since acids and bases readily react with each other, it is experimentally quite easy to find the amount of acid in a solution by determining how many moles of the base are required to neutralize it. This operation is called titration, and you should already be familiar with it from your work in the Laboratory. We can titrate an acid with a base, or a base with an acid.

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Zirconium Oxide Manufacturing Chemistry Essay

2 pages (500 words) , Download 2 , Essay

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There are several routes to the extraction of zirconium oxide: chlorination, alkali decomposition, lime fusion and precipitation of the acidic reagents. Zirconium oxide has a very high resistance to heat, so it's ideal to be used as a refractory insulating material, industrial manufacture of crucibles and production of alkaline zirconate.

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Causative Agents of Earthquakes Chemistry Assignment

1 pages (315 words) , Download 2 , Assignment

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Studies have identified a number of factors as the causative agents of earthquakes with fracking as one of them. Such a cause has had scientific backing with transform plate boundaries sliding past one another, resulting in land disturbances in areas around the transformed plates, an aspect considered as the greatest contributor towards the occurrence of earthquakes as contributed to by fracking.

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Polyvinylchloride Contraversy Chemistry Essay

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Polyvinylchloride (PVC) is a tough and rigid synthetic thermoplastic used extensively across the world. PVC remains unique among other thermoplastics owing to its high ability to withstand high temperatures. It has superior fire performance relative to other polymers. The synthesis of polyvinyl chloride is done using free-radical polymerization.

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Rate of Decomposition of Hydrogen Peroxide Chemistry Lab Report

3 pages (937 words) , Download 4 , Lab Report

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The decomposition of hydrogen peroxide was studied. The concentration of hydrogen peroxide at intervals of 5 minutes was recorded through the titration of the reaction mixture with standard potassium permanganate. Fe3+ acted as a catalyst. Graphs that complied with the first-order reaction were drawn when values of Vt against t, and ln Vt against t were drawn.

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Biological Importance of Metal Complexes of Pyrimidine-2-Thione Chemistry Research Paper

6 pages (1500 words) , Download 2 , Research Paper

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According to the paper, the pyrimidine-2-thione metal complexes, or its hydroxyl derivatives and pyrimidine-2-thiol tautomeric type has been analyzed for representative ligands. These complexes illustrate rich structural chemistry, biological properties and magnetic properties. The M/H reaction systems illustrates interesting complexes source.

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Enthalpy of Neutralisation Chemistry Lab Report

2 pages (500 words) , Download 8 , Lab Report

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that the heat of enthalpy for NaOH to HCL was higher as compared to NaOH to CH3COOH, a factor attributed to the fact that in one case, a strong acid was used while in another case, a weak acid was used. Conventionally, enthalpy changes when a strong base is mixed with a strong

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Chemistry Essays