Chemistry Essays Examples For College & High School Students in PDF

1489 total results

A Description of the Fusion Reactions as Inhibited By the Electrical Repulsive Force (2689 words, 4 pages)

Fusion reactions are inhibited by the electrical repulsive force that acts between two positively charged nuclei. For fusion to occur, the two nuclei must approach each other at high speed to overcome the electrical repulsion and attain a sufficiently small separation (less than one-trillionth of a centimeter) that the short-range ... Read More

A Study of Cement (1311 words, 5 pages)

Geology 101, Section 12262 According to the Mine Faculty at the University of Arizona, cement ismanufactured primarily from suitable limestone and shale rocks. Arizona had twodry-process cement plants in 1969, namely the Arizona Portland Cement Companyplant in Pima County, near Tucson, and the American Cement Corporation plant atClarkdale, in Yavapai ... Read More

Cognitive Development in Early Childhood (774 words, 2 pages)

Early childhood is often characterized by endless make-believe and sociodramatic play which indicates the development of mental representation. Sociodramtic play differs from simple make-believe play in that it involves play with peers. This stage of play is often referred to as the Preoperational Stage. This is the stage immediately after ... Read More

A Way to Distinguish Between an Element and a Compound (726 words, 2 pages)

A compound is a chemical substance that consists of several (minimum two) elements. The compound has defined structure, chemical and physical properties. These are typically found in chemistry or physics books. The constituents of the compound can not be separated by physical method, for instance, boiling, freezing, sieving, or gravity ... Read More

An Analysis of an Experiment on Electricity (2474 words, 3 pages)

The scientific methods involve the performing of the experiments, making the observations and drawing the conclusions from the set of observations. While embracing the scientific methods in tackling problems, one has to follow the five necessary steps so as to reach to a viable conclusion. The first step of the ... Read More

The Stoichiometry of Chemical Reactions Involving Calcium Nitrate and Sodium Phosphate (532 words, 2 pages)

The objectives of this experiment is to establish and determine the stoichiometry of the precipitation chemical reaction involving calcium nitrate (Ca(NO3)2) and sodium phosphate (Na3PO4) as the reactants that will form the precipitate calcium phosphate (Ca3(PO4)2) at the end. The experiment will also determine any physical and chemical changes such ... Read More

Analyzing the Observation of a Titration of Calcium Nitrate Solution and Sodium Phosphate (324 words, 2 pages)

The following observations were made during the titration of 60 ml of 0.100M of Calcium Nitrate solution with 0.100M solution of Sodium PhosphateThe temperature of the titrated solution in the beaker increase gradually until a particular point after it started reducing on further titration.The color of the solution changed from ... Read More

A Report on Quasi-experimental and True Experimental Research Methods on Population (433 words, 1 pages)

The answers for the above research question can be elucidated by using various quantitative research methods as well as different designs. In this research quasi-experimental and true experimental research methods are used to obtain data from the population in consideration while the research designs used are single-subject and pre-experimental. A ... Read More

A Study of the Element Magnesium (1534 words, 4 pages)

Magnesium is a biogene element which is present in the tissues of all organisms. It is a part of a molecule of a green pigment of plants - Chlorophyll, which participates in a mineral exchange, activates fermental processes in an organism, increases drought resistance of plants. Bioluminescence and some other ... Read More

An Overview of the Chemical Decomposition in Water Experiment (370 words, 1 pages)

Chemical decomposition is defined as the breakdown of a compound into simpler compounds or its basic elements. This type of chemical reaction occurs when a chemical is exposed to extreme environmental conditions like heat, radiation, humidity or acidity in a particular solvent. A chemical decomposition is much more than just ... Read More

The Many Challenges Faced by Women in Their Bid to Become World Leaders (1231 words, 2 pages)

There are many challenges faced by women globally in their bid to become world leaders. This is the reason why the number of women in leadership positions continues to be too small compared to that of men. In fact, it would be fair to say that this is a male ... Read More

An Experiment of Cell Membrane (575 words, 1 pages)

Cell membrane is the focus of this laboratory experiment. The plasma membrane has got three components namely cholesterol, protein, and phospholipid (glycerol and charged phosphate). The molecules of phospholipid have got one water soluble end (hydrophilic) and the other end which is not soluble in water (hydrophobic). The hydrophilic head ... Read More

A Report on Minerals (612 words, 2 pages)

Minerals are referred to as the inorganic micronutrients. The body needs them in a standard quantity for proper functioning. In total there are sixteen essential mineral nutrients that must be supplied in our diets. In general, these are divided into two main categories namely the major and trace minerals. The ... Read More

An Argument Against ESA (887 words, 3 pages)

chat.onload(function(chats, online) var link ("content1chatid") link.onclick function(e) chat.openrandom(0) return false ) chat.onupdate(function(chats, online) )1. Based on your interpretation of the essays briefly summarize the main arguments for and against ESA. Which arguments are most compelling and why?The argument on the effectiveness of ESA based on evidence could be considered as ... Read More

The Accounting Rules for Preparing Cash Flow Statements as Provided by the IAS (940 words, 2 pages)

IAS provides the accounting rules that should be followed by an entity when preparing Cash Flows Statement. Cash flows include the inflows and outflow of both cash and cash equivalents (Pratt Grabowski 2010). The cash equivalents include cash on hand, bank balances for immediate use, other demand deposits, and short-term ... Read More

A Lab Experiment to Design an Amplitude Modulation (AM) Radio (1775 words, 3 pages)

ObjectiveThe objective of this lab is to design and AM Radio. IntroductionAm radio uses Amplitude Modulation (AM), which works by varying the strength of the transmitted signal in relation to the information being sent. When you tune into an AM radio station, for example 1560 on the AM dialthe transmitters ... Read More

A Research on the Need for Animal Experimentation (1934 words, 3 pages)

Animal Experimentation A Necessary EvilIt is time for society to realize that no one benefits from the suffering of animals used in expensive and useless experiments. Animals may not be able to speak like humans but it does not negate the fact that they are capable of suffering. The human ... Read More

An Experiment Set to Investigate How Many Daisies, Dandilions and Rats Tails are on the School Field (226 words, 1 pages)

A Sampling ExperimentAimTo investigate how many daisies, dandilions and rats tails are on the school field.Method1.We firstly placed the quadrats onto the school field and we then counted how many of the specific weed their were in that particular area, we collected all of this information in a small table.2.We ... Read More

The Element Information, Properties and Uses of Einsteinium (342 words, 1 pages)

The element (einsteinium) has the atomic symbol of Es. Its atomic number is 99 while its atomic mass is 252. Einsteinium is located in period 7 of the periodic table as a part of the actinide series. It has 99 protons, 99 electrons, and 153 neutrons in its atoms. The ... Read More

A Review of the Experiment of Abstract Chemical Reactions Used to Produce Electricity (2714 words, 3 pages)

AbstractChemical reactions can be used to produce electricity and electricity can be used to cause chemical reactions through oxidation-reduction reactions. The first part of the experiment measures the standard electrode potentials of five various half cells against the Cu2(1M)Cu half cell. The last three half cells are prepared through electrolysis. ... Read More

An Overview of the Experiment on Determination of the Equilibrium Constant of an Unknown Ester Hydrolysis Reaction (772 words, 2 pages)

Determination of the Equilibrium Constant of an Unknown Ester Hydrolysis ReactionAbstractThe experiments to follow determined that the equilibrium concentrations of the reaction ester water alcohol acid, are equal to 0.0363 moles of ester, 0.2852 moles of water, and 0.0268 moles each of alcohol and acid. Using this information the equilibrium ... Read More

An Overview of the Experiment on the Rate of a Chemical Reaction Upon Reactant Concetrations (610 words, 1 pages)

Abstract The rate of a chemical reaction may depend upon reactant concentrations, temperature, and the presence of catalysts. The results from the experiment show the orders are k I0H2O2 and overall order is 1 and the reaction rate is 0.0500t. The rate constant is 1.04 x 10-2 s-1.IntroductionThe rate of ... Read More

An Analysis of the Experiment on the Corelation of the Concentration of Hydrogen Peroxide and Oxygen (1065 words, 2 pages)

Preliminary Experiment (4 yeast concentration)Hydrogen peroxide volume 5 cm3Water Volume -0 cm3Concentration Volume- 20 volsTime in SecondsVolume of O2 (cm3)Experiment 1Experiment 2Average30959494.56010010010090100100100120100100100150100100100180100100100ModificationsThe results from my preliminary experiment show that 100 cm3 of oxygen has been produced in the first 30 seconds.. This reaction is far too quick and will prevent ... Read More

An Analysis of an Experiment Examining the Coefficients of Static and Kinetic Friction (831 words, 1 pages)

October 13,2005FOCUSThe purpose of this experiment is to examine the coefficients of Friction, both static and kinetic. Friction is the force that exists between one surface and another. There are two types of friction both of which were examined in this experiment, kinetic and static. This lab applied Newtons three ... Read More

An Analysis and an Investigation on the Experiment of the Rate of Reaction Between Hydrochloric Acid and Sodium Thiosulphate (914 words, 2 pages)

An investigation to show how the rate of reaction between hydrochloric acid and sodium thiosulphate is affected by the concentration of the acidSimple ProcedurePlace a conical flask on a piece of paper with a cross on it. Add hydrochloric acid and sodium thiosulphate, and record the amount of time taken ... Read More

The Characteristics of Chlorofluorocarbons, an Environmental Hazard (1457 words, 2 pages)

ChlorofluorocarbonsChlorofluorocarbons are non-toxic, non-flammable chemicals that are mainly used in the manufacturing of aerosols, blowing agents for foams and packing materials, as solvents, and as refrigerants. They are classified as Halocarbons, a class of compounds that contain carbon and halogen atoms, and are amongst a group of substances called greenhouse ... Read More

An Analysis of an Experiment on Using the Enzyme Catalase to Rapidly Catalyze the Decomposition of Hydrogen Peroxide into Oxygen Gas and Water (2015 words, 3 pages)

AP Biology Enzyme LabIntroductionHydrogen peroxide is formed as a waste product of metabolism in many living organisms. It is toxic and must be quickly converted into other, less dangerous chemicals. To manage this problem, the enzyme catalase is frequently used to rapidly catalyze the decomposition of hydrogen peroxide into harmless ... Read More

An Analysis of the Rate of Reaction in an Experiment with Calcium Chloride, Water and Carbon Dioxide (884 words, 1 pages)

An investigation in to the rate of reaction PlanI am going to investigate the rate of reaction. The reaction I will be using isCalcium Carbonate Hydrochloric acid ---- Calcium Chloride water carbon dioxide.CaCO3 2HCl ---- CaCl H2O CO2Measurements and VariablesThe variables I have chosen to change is strength of the ... Read More

An In-Depth Look at the Versatility of Diels-Alder Reactions (1569 words, 2 pages)

An In Depth Look at the Versatility of Diels-Alder ReactionsIntroduction.It all started in the 1920s, when a pair of skillful chemists discovered what would become one of the most useful experiments ever performed. The name of this fascinating discovery is the Diels-Alder reaction. This reaction was named after two chemists, ... Read More

The Reactions, Standardizations and Titrations of Acids and Bases (2660 words, 3 pages)

Acids Bases Reactions, Standardizations, Titrations Experiments 21 22 Experimental OverviewThe procedure for this experiment was carried out as instructed in the laboratory manual, Experiments in General Chemistry, 4th ed., S.L. Murov, Experiment 21, Acids and Bases Reactions and Standardizations, and Experiment 22, Acids and Bases Analysis. There were modifications made ... Read More

Chemistry Essay Examples