Chemistry Essays

Scrubber System

In short a scrubber system basically removes harmful materials from exhaust gases before they are released into the environment or atmosphere. There are two types of scrubbing methods. There is wet and dry scrubbing. Both systems work in similar ways and have the same end result. That is to change a toxic chemical into something less toxic or non-toxic. Now scrubber systems rely on a chemical reaction with a sorbent (which is a material that sorbs another substance or A…

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Chemical Reactions in our Daily Life

Science being a subject of common interest, it is very intriguing to analyze visual experiments happening in day-to-day life. There are a plethora of products that you use everyday, which are formulated with application of chemical reaction. Say for example; toothpaste, soap, shampoo, cleaning agent, etc. are all results of chemical reactions. Following are some of the most profound chemical reactions, which we encounter in everyday life : Aerobic Respiration Do you know indulging in physical movements is associated with…

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Chemistry Is Everywhere

Everything you hear, see, smell, taste, and touch involves chemistry and chemicals (matter). And hearing, seeing, tasting, and touching all involve intricate series of chemical reactions and interactions in you body. With such an enormous range of topics, it is essential to know about chemistry at some level in order to understand the world around us. In more formal terms chemistry is the study of matter and the changes it can undergo. Chemists sometimes refer to matter as ‘stuff’, and…

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Rate Law and Activation Energy

Introduction In this experiment we are analyzing the relationship between reaction rates at different concentrations and temperatures to determine the true rate constant, activation energy, reaction orders, and half-life of a reaction. The reaction of interest is the addition of a hydroxyl group to the nucleus of Crystal Violet. Crystal Violet, or hexamethylparaosaniline chloride for short, is a strongly colored purple dye with the chemical formula C25H30N3Cl and disassociates completely in solution. The relevant structure for this compound can be…

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Determination of the Formula Unit of a Compound

1)The crucible is weighed and the exact mass is recorded. 2)Approximately 0.2g of zinc is placed into the crucible and the crucible with its contain is weighed. The exact mass of zinc is determined. 3)10 ml of 6M HCl solution is poured into a measuring cylinder. 4)The 10 ml of 6M HCl solution is carefully added into the crucible containing zinc powder and the contents is stirred gently using a glass rod. A vigorous chemical reaction occurred and hydrogen gas…

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Gravimetric Determination of Phosphorus in Fertilizer Samples

I. Abstract The purpose of this experiment is to determinethe Phophorus content of fertilizer samples using Gravimetric Analysis. It involves dissolution of the fertilizer sample, precipitation and heating and cooling of the sample. Pooled standard deviations of the two data sets for % Pwet, %Pdry, %P2O5 wet and %P2O5 dry were 5.1448, 5.1472, 11.8436 and 11.8504 respectvely. During the experiment a data rejection for %P and %P2O5 was concluded at approximately 20% and 47%. Determination of the Phosphorus content in…

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Elimination Reactions

As described previously, primary alkyl halides generally undergo substitution reactions with simple nucleophiles by an SN2 mechanism. Secondary alkyl halides, often react with simple basic nucleophiles to give a mixture of products arising from both substitution and elimination. As with substitution reactions, the rate at which elimination reactions proceed can be proportional to both the concentration of the base and the concentration of the reactant alkyl halide (an “E2” reaction (elimination bimolecular), or the rate can be proportional only to…

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Pharmaceutical Science and My Interest in Chemistry

I pursued bachelor of pharmacy from Sarada Vilas College of pharmacy, Mysore One of the best academic institutions for pharmacy under Rajiv Gandhi University of health sciences. Prospective Interest—— chemistry Pharmaceutical science is a multi faceted field, which incorporates a myriad number of subjects, which Include biotechnology, physiology, pharmacology, pharmaceutics, molecular biology so on and so forth. But one field that stands out in its contribution to pharmacy is chemistry. The four years of my course work in B-pharmacy have…

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Homeostasis Lab Report

Mr. Bell’s honors level chemistry class conducted an experiment during their lab demonstrations, this consisted of elements such as phosphorus and calcium chloride in their experiment. This along with another hydrogen based sunstance produced, what looked like a pinkish-looking substance inside of their flasks that were at their lab stations. Sophmore Kelly Caudel said, ” I actualley enjoy doing the experiments in this class, because it gives us a chance to get away from the bookwork and lectures that Mr….

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Preparation of Alum from Aluminum Metal

The objective of the laboratory is to synthesize alum (KAl(SO4)2.xH2O) from aluminum powder and to determine the proportion of water in the alum crystals. Alum is a product from the reaction between potassium hydroxide and sulfuric acid. The reaction include several steps, as followed: Aluminum powder reacts with potassium hydroxide to generate Al(OH)4- ions and release hydrogen. 2 Al(s) + 2 KOH(aq) + 6 H2O 2 K[Al(OH)4](aq) + 3 H2 (g) A gelatinous precipitate of aluminum hydroxide was created when…

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chordates and Vertebrates Lab

Procedures/Methods: For each organism, find and draw a representative image. Each organism may include prepared slides as well as specimens, or students may need to find them on the internet. Provide descriptive notes for each organism and address any questions asked in detail using complete sentences. List all references. Results: 1. Urochordata –Tunicates a. Molgula – preserved i. What is the function of the two knobs/protrusions? The function of the two knobs/ protrusions are the incurrent and excurrent siphons. These…

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Evidence of Chemical Change

Purpose To observe several chemical changes (reactions) and the evidence they exhibit for chemical change. Data See page 3 Analysis The two terms that describe possible energy change in a chemical reaction are Exothermic, for example when a gas is formed when Copper II Chloride and Aluminum are mixed, and Endothermic, for example when copper II Hydroxide is heated. There are many substances used in this experiment, the elements are Hydrogen Gas, Aluminum, and solid Copper, the compounds are Copper…

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beer’s Law Lab Report

Abstract: The Beer’s law lab was conducted to determine the optimal wavelength of Co(NO3)2·6H2O with the use of spectrometry. The results determined that the optimal wavelength to study the absorbance of this salt was 500nm. It also demonstrated how transmittance of light and absorbance of light are inversely proportional because absorbance is calculated by multiplying transmittance by a negative log. Introduction: When one is studying chemicals, there are many important factors of significance. The color of a chemical is a…

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Hydrogen Peroxide and Iodide Kinetics

(Be sure to state references for any cited value at the end of this report. Additionally, all report material must be in INK – pencil or white-out will render the work ineligible for mark appeal) 1.What observations and conclusions can you note about each of the three reactions that occurred in the test tubes where you combined potassium iodide, KI, and hydrogen peroxide, H2O2 (in part 1) of the experiment? (Give a detailed explanation of any observations that you made,…

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Organic Chemistry

For the cycloalkanes, one hydrogen atom has to be removed from each end of the hydrocarbon chain, therefore resulting to a deficit of two hydrogen atoms unlike in the case of alkanes. What is the three dimensional structure of methane? Why? Methane represents a tetrahedral structure. This is because the structure permits the orbitals to be as far apart and the hydrogen atoms directed to the corners of the tetrahedron when the carbon is bonded to four other atoms Name…

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