Chemistry Essays Examples For College & High School Students in PDF

1489 total results

An Introduction to the History and Origins of the Field of Chemistry (1543 words, 3 pages)

The History of ChemistryChemistry is the science of the composition and structure of materials and of the changes that materials undergo. It is also used in improving standards of living, making it possible for such substances as rubber, nylon, and plastics to be made from completely different materials. New materials ... Read More

An Introduction to the Field of Chemical Engineering (2234 words, 4 pages)

What exactly is a chemical engineer? Many would say that it is simply a "chemist who builds things" or an "engineer who makes chemicals. However, neither of these statements is completely true. The term "chemical engineer" is not meant to actually describe what it is a chemical engineer does, but ... Read More

An Evaluation of the Rate of Reaction of Magnesium of Hydrochloric Acid (3075 words, 12 pages)

BACKGROUND INFORMATION What affects the rate of reaction? 1) The surface area of the magnesium. 2) The temperature of the reaction. 3) Concentration of the hydrochloric acid. 4) Presence of a catalyst. In the experiment we use hydrochloric acid which reacts with the magnesium to form magnesium chloride. The hydrogen ... Read More

A Description of Water and Its Importance in Life (2231 words, 5 pages)

Water is the most important molecule that exists on the Earth. Without water living beings would not be able to live. Water is used for an immeasurable number of things. There are many properties of water, which makes this molecule so unique. One which people overlook is hardness. Hardness is ... Read More

A Comparison of the Different Types of Enzymes (794 words, 2 pages)

Enzymes EssayIntroductionEnzymes are the sparks that start the essential chemical reactions our bodies need to live. They are necessary for digesting food, for stimulating the brain, for providing cellular energy, and for repairing all tissues, organs, and cells. There are three types of enzymes metabolic enzymes, digestive enzymes, and food ... Read More

A Comparison of Mixtures and Pure Substances (720 words, 2 pages)

Mixtures and pure substances- Pure substances are matter made up of only one type of atom or molecule- Mixtures are a collection of 2 or more pure substances physically mixed together that cannot be represented by a chemical formula.- A mixtures properties may vary, because the proportions of the substances ... Read More

A Discussion on Discovery and Nature of Lawrencium Element (507 words, 1 pages)

LawrenciumThere are 109 known elements, and of those, 19 of them are artificially produced or synthetic. A synthetic element is made by bombarding atomic nuclei with neutrons or other particles. The element Lawrencium has been made in this manner. While scientists continue to work to create more elements, it should ... Read More

A Biography of Robert Burns Woodward the Chemist (1019 words, 5 pages)

Biography of Robert Burns WoodwardRobert Burns Woodward was born in Boston on April 10th, 1917, the only childof Margaret and Arthur Woodward, of English antecedents. Robert's father Arthur died inOctober of 1918, at an early age of only thirty-three years old. Robert Woodward was attracted to chemistry at a very ... Read More

An Analysis of the Nature of Organic Compounds and Their Uses (1197 words, 3 pages)

Organic compounds are covalently bonded compounds containing carbon, excluding carbonates and oxides. Carbon atoms are unique because of their ability to bond by catenation, which is forming long chains and rings from the covalent binding of an element to itself. Besides bonding with itself, carbon atoms are able to bind ... Read More

A Comparison of Wellesley Tap Water and Water of the Surrounding Towns (1328 words, 3 pages)

Science Fair Project 32100Science 21Background InformationI tried to figure out how does the Wellesley tap water compare to the water of the surrounding towns.Before I started my tests I guessed which town would have the best quality water without any initial data. I thought that Wellesley tap water would be ... Read More

A Report on the History of Carbon (1107 words, 6 pages)

The History of CarbonI. IntroductionA. The History of CarbonII. Occurrences in NatureA. DiamondB. GraphiteC. Coal and CharcoalD. Amorphous CarbonIII. Carbon CompoundsA. InorganicB. OrganicIV. The Carbon CycleIV. ConclusionCarbon, an element discovered before history itself, is one of the mostabundant elements in the universe. It can be found in the sun, the ... Read More

Electroplating Put Into Everyday Use (686 words, 1 pages)

ELECTROPLATINGThe problem was to discover which electrolyte is the best. An electrolyte is a liquid you electroplate in. Water, vinegar, and vinegar with salt stirred in it were the three electrolytes used. Which is the best electrolyte for copperplating a nickel? Is there a difference between these electrolytes or are ... Read More

A Study on the Functioning of Solar Cells Using Silicon (1130 words, 2 pages)

Solar cells today are mostly made of silicon, one of the most common elements on Earth. The crystalline silicon solar cell was one of the first types to be developed and it is still the most common type in use today. They do not pollute the atmosphere and they leave ... Read More

History and Methods of Fermentation (771 words, 2 pages)

Literature ReviewScience knows no country, because knowledge belongs tohumanity, and is the torch which illuminates the world. Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence. Louis Pasteur, Great French Scientist (1822-1892).Fermentation is chemical ... Read More

Oxygen: The Essential Element for Survival (989 words, 4 pages)

OXYGENOxygen is the most abundant element on the earth. It makes up 23 percent of air, 89 percent of water, and about 46 percent of crustal rock It also comprises 60 percent of the human body. Oxygen is an essential element for survival. Without it, we would not be here ... Read More

A Study on the Coefficient of Expansion on Heating Solids (744 words, 7 pages)

IntroductionMost solid materials expand upon heating and contract when cooled because it undergoes a change in the energy state of its molecules or atoms. According to the atomic perspective, the average vibrational amplitude of an atom increases as the temperature rises. Each material has a property called coefficient of linear ... Read More

The Conversion of Energy Through Glycolysis (936 words, 2 pages)

Glycolysis, the Universal Process Nine reactions, each catalyzed by a specific enzyme, makeup the process we call glycolysis. ALL organisms have glycolysis occurring in their cytoplasm.At steps 1 and 3 ATP is converted into ADP, inputting energy into the reaction as well as attaching a phosphate to the glucose. At ... Read More

A Lab Experiment to Determine The Most Effective Measuring Equipment (958 words, 3 pages)

IntroductionThe meaning of this experiment was to understand and use the basic tools for chemistry. During this experiment, many calculations were taken from data collected. We had to make sure measurements were taken accurately in order to complete the right equations. Using these equations we could determine volume, weight, and ... Read More

A Measure of Water Quality in Oakland Ravine and the Lake (380 words, 1 pages)

Lab 4 Oakland Ravine and Lake Water Quality 1. The pH levels are fairly constant for inlet and outlet. The dissolved oxygen(dO), on the other hand, varies very much between the inlet and the outlet. The measurements of the pH and the dO of the water do not differ greatly. ... Read More

Italian Scientist Julius Scaliger Discovered Platinum (936 words, 2 pages)

Platinum, symbol Pt, is a relatively rare, metallic element that is more expensive than gold. The atomic number of platinum is 78. Platinum is one of the transition elements in group 10 of the periodic table. Platinum is the most important of the group of elements called platinum metals. Also ... Read More

A Biography of Alfred Nobel (304 words, 1 pages)

Alfred NobelAlfred Bernhard Noble was a Swedish chemist, inventor, and industrialist. His most famous and most important invention were Dynamite and Nitroglycerin Alfred was born on October 21, 1833. When he invented Dynamite, a large sum of money was his reward. Alfred left most of his reward in trust, as ... Read More

Determining the Molecular Weight of an Unknown Solid Organic Compound by Freezing Point Depression (228 words, 3 pages)

Lab ReportIntroductionThe purpose of this lab was determining the molecular weight of an unknown solid organic compound by freezing point depression. In order to do so, one has to first, freeze cyclohxane, by putting it in ice cold water, and see what the constant temperature comes out as. Then, one ... Read More

Defining the Scope of Chemistry and Types of Chemical Reactions (278 words, 1 pages)

CHEMISTRY IS THE STUDY OF MATTER ANDTHE CHANGES IT UNDERGOES. THESE CHANGES OCCUR WHEN THE ATOMS OF A SUBSTANCE ARE REARRANGED TOMAKE A NEW SUBSTANCE. THIS IS CLASSIFIED AS A CHEMICAL REACTION. BUT BEFORE YOU GET INTO A CHEMICAL REACTION YOU MUST LEARN ABOUT WHAT MAKES UP A CHEMICAL SUBSTANCE. ... Read More

The Discovery of Nitrogen and Its Main Characteristics (590 words, 4 pages)

NitrogenNitrogen, symbol N, gaseous element that makes up the largestportion of the earth's atmosphere. The atomic number of nitrogen is 7. Nitrogen is in group 15 (or Va) ofthe periodic table.Nitrogen was discovered by the British physician DanielRutherford in 1772 and recognized as an elemental gas by the French chemist, ... Read More

An Experiment Determining the Relationship between the Pressure and the Volume of a Confined Gas (267 words, 2 pages)

Boyles Law Pressure-Volume Relationship in GassesObjectThe object of this lab is to determine the relationship between the pressure and volume of a confined gas. This relationship is shown by Boyles law. ProcedureHook up the pressure sensor Calibrate the pressure sensor.First, open the side arm and record as 1 atm.Next, put ... Read More

How to Determine the Empirical Formula of Silver Oxide (286 words, 2 pages)

Determination of a Formula by AnalysisPrinciple Determine the percent of Silver and Oxygen in Silver Oxide to determine the empirical formula.Experimental Procedure Place a clean porcelain crucible without lid onto a wire triangle on a tripod or ring. Heat the crucible for several minutes to a dull red heat using ... Read More

An Analysis of Chemistry in Everyday Life (564 words, 1 pages)

CHEMISTRY IN EVERYDAY LIFEDuring laboratory technique 1 we learned how to separate insoluble liquids from solids by means of filtration, and how to separate a dissolved solid from a liquid by means of evaporation. I have often asked myself the importance of some of the required classes in my schedule ... Read More

The Life and Scientific Work of British Chemist and Physicist John Dalton (457 words, 3 pages)

John DaltonJohn Dalton (1766-1844), was a British chemist and physicist, who developed the atomic theory upon which modern physical science is based. Dalton was born on September 6, 1766, in Eaglesfield, Cumberland County, England. He was the son of a weaver and was initially educated by his father and then ... Read More

An Analysis of the Determination of the Relationship of Gas Production To Respiration Rate (600 words, 3 pages)

IntroductionThis lab was done to determine the relationship of gas production to respiration rate. Justin Pyka and I did the lab on December 12th, 2000 in Mr. Myers room. The lab was done with dormant pea seeds and germinating pea seeds. It was done to test the effect of temperature ... Read More

An Analysis and Interpretation of Lab Results (603 words, 1 pages)

This lab used many test to determine which functional groups were present in certain substance. The Benedicts test was used to identify reducing sugars (glucose and fructose) based on their ability to reuce the Capric ions to cuprous oxide at high pH. The Cuprous oxide is reddish orange in color ... Read More

Chemistry Essay Examples