Chemistry Essays Examples For College & High School Students in PDF

1489 total results

A Lab Experiment to Calculate the Solubility Product Constant of an Ionic Salt from Titrations (772 words, 3 pages)

Calculating Ksp of an Ionic Salt from TitrationsIntroductionDifferent substances dissolve to different degrees in water. Some ionic salts may completely dissociate into their ions, while some salts may only partially dissociate. The degree to which a substance is soluble in water is called Ksp, or the solubility product constant, which ... Read More

Enzymes as Catalysts: The Process of Catalase Decomposing Hydrogen Peroxide (1102 words, 4 pages)

Enzymes as Catalysts The Process of Catalase Decomposing Hydrogen PeroxidePurpose The purpose of the lab is to learn the functions of enzymes, especially in chemical reactions, and to determine if, over time, enzymes activity changes in rate. More specifically, the lab was performed to learn the use of catalase in ... Read More

A Lab Report on Testing and Verifying the Specific Heat of Aluminum (1340 words, 7 pages)

Specific Heat Lab Purpose The purpose of this lab was to test and verify the specific heat of a metal. The students heated aluminum in order to understand and observe the specific heat equation in motion in a calorimeter. Using the calculations from the lab, the students were then able ... Read More

A Lab Experiment to Determine Water Percentage Within the Sample Copper Sulfate Pentahydrate Compound (1826 words, 9 pages)

Hydration LabPurpose The purpose of this lab was to determine the percentage of water within the sample copper sulfate pentahydrate compound. The goal of the students was to record the amount of water evolved in comparison to the amount of copper sulfate and calculate the amount of moles of water ... Read More

An Experiment on the Dilution of Stock Solutions (1679 words, 9 pages)

Abstract In this experiment we are going to learn how to dilute stock solutions and learn about the different concentration units and how to convert between the different units. We will calculate the volume of the concentrated solution in order to obtain the desired volume and concentration, using the rule ... Read More

An Experiment on the Ideal Gas Law (1248 words, 5 pages)

ABSTRACTThe Ideal Gas Law is widely recognized and used to find a certain aspect of a gas, such as its pressure, volume, amount of moles, or temperature. In this experiment we were able to collect a gas (H2) evolved in a given reaction and measure its temperature, volume and pressure. ... Read More

An Experiment Demonstrating the Law of Definite Proportion (897 words, 4 pages)

AbstractHydrates are substances formed by the combination of water with ionic salt in definite portions. Hydrates are ionic compounds. Which are also known as salts. Hydrates have a specific amount of water in the compound. When the compound is applied to heat the water evaporates and the remaining solidsubstance which ... Read More

The Study on the Interactions Between the Chemical Components of the Earth Through Geochemistry (348 words, 2 pages)

Earth science involves the study of the earth's physical components.These components include water, land, air and all the processes thatinfluence them. Essentially, Earth scientists tend to study the physicalspheres of the earth. A logical system is created by the interaction ofthese physical components of the earth. Through geochemistry, earthscientists can ... Read More

A Lab Experiment on the Separation of Anethole and Dimethyl Phthalate Through Column Chromatography (303 words, 4 pages)

Separation of Anethole and Dimethyl Phthalate Through Column ChromatographyAbstractAn unknown liquid solution was analyzed using Column Chromatography. The resulting solution of Anethole and Dimethyl Phthalate was dried and an NMR spectrum obtained.Structures2AnetholeDimethyl PhthalateExperimentalAn unknown liquid mixture ( 41C) was separated using Column Chromatography. The column was set up using Pasteur ... Read More

The Science of Hydrogen Bonds (363 words, 2 pages)

Hydrogen bonds are bonds between two molecules caused by an electrostatic attraction between a proton and a negatively charged atom e.g. Nitrogen, Oxygen or Fluorine. These tend to be weak bonds compared to ionic or covalent bonds (but stronger than intermolecular bonds), however if there are a series of Hydrogen ... Read More

An Experiment Demonstrating the Process of Diffusion (784 words, 4 pages)

IntroductionDiffusion is the natural movement of particles from a higher to lower concentrated area. Osmosis, being a subset of diffusion, is the movement of water molecules from a lower to higher concentrated area. The goal of this lab was to see whether glucose, starch, water, or iodine could would be ... Read More

An Experiment on the Synthesis of Chromium (II) Acetate Hydrate (1298 words, 6 pages)

Synthesis of Chromium (II) Acetate Hydrate AbstractA 1.91g sample of red chromium(II) acetate hydrate was prepared, for a yield of 36. The reaction was carried out by reduction of Cr(III)Cl3 by elemental zinc under strongly acidic conditions with concentrated HCl entirely under oxygen free conditions, for a green to blue ... Read More

An Experiment Analyzing the Synthesis of Optical Tris Cobalt Enantiomers (2073 words, 8 pages)

Synthesis and Isolation of Optical Tris(ethylenediamine)cobalt(III) Enantiomers AbstractA sample of () Tris(ethylenediamine)cobalt(III) was produced by a reaction of ethylenediamine, hydrochloric acid, and cobalt sulfate which was oxidized with atmospheric oxygen with charcoal catalyst. The neutralized and filtered portion was mixed with L() tartaric acid from barium tartrate solution, separating out ... Read More

An Experiment Analyzing the Synthesis of Hexamminecobalt Chloride (1805 words, 8 pages)

Abstract Hexamminecobalt(III) chloride, Co(NH3)6Cl3, was produced by reaction CoCl2 6H2O, NH3, and NH4Cl, bubbled through with O2 in the presence of an activated charcoal catalyst, followed by filtration and recrystallization for a 23.2 yield of an orange complex. UV-Vis spectroscopy obtained an electronic spectrum with two peaks at 334.5 nm ... Read More

An Experiment on the Synthesis and Determination of Oxobis(2,4-Pentanediono)vanadium(IV) (1748 words, 8 pages)

Synthesis and determination of Oxobis(2,4-pentanediono)vanadium(IV) AbstractOxobis(2,4-pentanediono)vanadium(IV) was formed by a reaction V2O5 with ethanol under acidic conditions with heat to reduce V(V) to V(IV) and chelated with deprotonated acetylacetone in a basic solution until neutral in pH, forming a deep blue powder that was collected by filtration under vacuo and ... Read More

An Overview the Application of Group Theory in Chemistry (1980 words, 9 pages)

A Review of Group Theory in Chemistry and its ApplicationsIntroductionGroup theory is a central topic in the discipline of abstract algebra, however, its application is also critical to many problems and areas of chemistry. Group theory offers a systematic method for classifying crystal structure, determining spectroscopic properties, and understanding molecular ... Read More

An Experiment on the Synthesis and Determination of Bis (tetraethylammonium) Tetrachlorobaltate (II) (1911 words, 8 pages)

Synthesis and Determination of Bis(tetraethylammonium) Tetrachlorocobaltate (II) AbstractBis(tetraethylammonium) tetrachlorocobaltate (II) was formed by a reaction of aqueous CoCl2 6H2O and aqueous tetraethyl ammonium solutions, yielding a blue precipitate. The solution was filtered under vacuum and recrystallized producing a blue powder with a 67.9 yield. UV-Vis spectroscopy revealed an electronic spectrum ... Read More

An Experiment Measuring the Refractive Index of Two Solutions (2537 words, 12 pages)

Determination of dipole moment and orientational polarization of chlorobenzene and o-dichlorobenzene in dilute solution from measured capacitance and refractive indexAbstractSolutions of chlorobenzene in cyclohexane and o-dichlorobenzene in cyclohexane in varying dilute concentrations were measured for capacitance and refractive index in order to determine orientational polarization and dipole moment using the ... Read More

An Experiment on the Formation of a Racemic Mixture Through the Microwave Process of 4-Tert-Butylcyclohexanone in Sodium Borohydride and Silica Gel (847 words, 6 pages)

AbstractWhen 4-tert-butylcyclohexanone is microwaved in sodium borohydride and silica gel, a racemic mixture is formed. The racemic mixture is cistrans-4-t-cyclohexanol. The reaction scheme can be seen in Figure 1. Figure 1 Mechanism for the reduction of 4-t-butylcyclohexanone shown using chair conformations. The major product is the trans product.To determine the ... Read More

An Experiment on the Creation of 1-Methylcyclohexene Through the Distillation of 2-Methylcyclohexanol (912 words, 6 pages)

AbstractDehydration reactions are often used in many situations to change one molecule into another with the use of water and acid. The dehydration of 2-methylcyclohexanol was used to reinforce the use of Br2 testing, IR spectroscopy, and to display a dehydration reaction. The dehydration resulted in a product which was ... Read More

A Lab Experiment to Describe the Changes in the Back-and Forth Motion of a Pendulum by Measuring the Properties of a Pendulum (785 words, 4 pages)

This pendulum labs objective is to describe how the back-and-forth motion of a pendulum can be changed through measuring the properties of a pendulum, as well as determine which properties of a pendulum affects its period. Groups of generally four students created their own pendulum, all materials provided in the ... Read More

A Lab to Determine the Concentration of SCN in Keith’s Sample (953 words, 4 pages)

Keith EqualBeginning IdeasIn order to determine the concentration of SCN in Keiths sample, methods used in previous abs were looked back to. Although colorimetry, titrations, and finding linear regression were used in previous labs, there were still things to understand in this one. One of the major things that had ... Read More

A Lab Experiment on the reaction Between Crystal Violet and Sodium Hydroxide (382 words, 2 pages)

Crystal Violet LabBeginning Ideas The purpose of this lab was to determine the rate law of the reaction between different amounts of crystal violet solution and sodium hydroxide. To start, this lab had much to do with the previous Blue Dye lab, which involved determining an unknown concentration. One thing, ... Read More

The Life and Contributions of Dr. Percy Lavon Julian (867 words, 4 pages)

Dr. Percy Lavon Julian was a spearheading chemist whose findings enhanced the field of science and saved many lives. A grandson of a slave, Julian grew up facing a lot of obstacles because of his skin color (Drew, 1950). African Americans during his time faced a lot of challenges like ... Read More

A Lab Experiment to Determine Exothermic and Endothermic Reactions (1754 words, 9 pages)

Lab Heats of ReactionClaimsThe reaction between calcium metal and hydrochloric acid is exothermic because the reaction releases energy, as shown in the negative heat of reaction value. The reaction between ammonium nitrate and water is endothermic because the heat of reaction is positive. IntroductionIn nearly every chemical reaction that occurs, ... Read More

A Lab Experiment to Synthesize Alum from Aluminum Soda Cans and the Efficiency of the Reaction (1378 words, 7 pages)

IntroductionAlum is a chemical which can be synthesized from aluminum. The uses of alum include water purification, flame retardant, and making explosives. The purpose of this lab is to synthesize alum from aluminum soda cans and to determine the efficiency of the reaction. Also, after doing this lab, it should ... Read More

Tap Water pH Neutrality and the Acidity of Gatorade (282 words, 1 pages)

What I Learned in the Take Home LabI have learned many things from the Take Home Lab, such as the tap water in my house is basic and that Gatorade is acidic.I hypothesized that the tap water in my house would be a pH of 7 because water is neutral. ... Read More

An Experiment to Determine the Efficiency of Isopropanol as a Solution (717 words, 4 pages)

An experiment was carried out to determine whether isopropanol (IPA) solution in water is a real or ideal solution. If the plot of solution volume of IPA and water versus the mole fraction of IPA in the solution (XIPA) was linear, then the solution would be classified as ideal. If ... Read More

A Study on Copper as an Antimicrobial Solution (558 words, 2 pages)

The antimicrobial properties of copper are documented in ancientEgyptian medical texts written before 2200 B.C. Copper has been used forhygienic and medical applications for thousands of years. Much of theresearch going into antimicrobial surfaces has focused on inorganicsurfaces such as copper and silver. One of the newer discoveries regardingantimicrobial surfaces ... Read More

A Lab Report on Determining the Best Ionic Salts for Hand Warmers (493 words, 2 pages)

Lab Write-UpThis lab was done in order to determine which ionic salts would make the best hand warmer. For Part A and Part B of the procedure for this lab, please see lab notebook data sheet. In Part C, we determined the delta H values for various other ionic salts ... Read More

Chemistry Essay Examples