Chemistry Essays Examples For College & High School Students in PDF

1489 total results

An Examination of the Behavior of Different Fruits in the Fermentation of Alcohol and the Significance in the Change of Yeast (398 words, 2 pages)

Sliced apples, water, corn syrup, and yeast were mixed together in a blender to create a mixture that would allow for the production of alcohol. In this particular experiment, the independent variable was the amount of yeast added to the mixture, as it varied among three separate groups (group yeast ... Read More

A Comparison the Effects of Canabis Sativa and Canabis Indica (1567 words, 7 pages)

MarijuanaIn todays society whenever someone thinks of a typical marijuana user, they associate them with teenage drop-outs, burn-outs, or someone that wont go far in life. According to Norml, a marijuana research website, Marijuana is the third most popular recreational drug in America (behind only alcohol and tobacco), and has ... Read More

A Study on What Temperatures Certain Proteins Lose Their Natural Qualities at (1735 words, 11 pages)

AbstractThe purpose of our lab was to figure out at what temperatures certain proteins would lose all of their natural qualities.To ask what proteins can really be put through and do all proteins denature at the same temperature? Denaturation is when proteins lose their structure after solvents like alcohol, strong ... Read More

A Report on the Chloride Concentrations in the Surficial Aquifer in the Upper and Lower Floridian Flow Paths (467 words, 1 pages)

The main idea is that groundwater from the islands surficial aquifer is moving downwards along vertical conduits and influencing the chemistry of the regional artesian aquifer. Additionally, the movement of salinebrackish water to the aquifer is causing a small increase in chloride concentrations within the Upper Floridian mixing line. This ... Read More

Lab Report: The Effect of Increasing Concentrations of Aspirin on the Average Percentage Change of Gas Formed (661 words, 5 pages)

What are they?Why?IndependentThis is the variable that I change, that is the concentration of aspirin Range 0.00, 0.25, 0.50, 0.75 and 1.00 Increment increasing by 0.25These ranges of values are used to increase the accuracy while plotting the graph and are also used to determine the effect of the aspirin ... Read More

A Lab Experiment on the Effects of Various Amylase Concentration on the Rate of Hydrolysis of Starch (1189 words, 6 pages)

An investigation into the effect of varying amylase concentration on starch digestionIntroductionAimThe aim of the experiment is to study the effect of various amylase concentrations on the rate of hydrolysis of starch. This will be performed by measuring time taken for the dark blue colour (formed between starch and iodine ... Read More

The Crucial Role of Dopamine for the Functioning of Our Minds and Bodies (1230 words, 5 pages)

The Role of DopamineIn 1990 the movie, Awakenings, starring Robin Williams playing as Dr. Malcolm Sawyer, this movie is based off of the book of the same name published by Dr. Sacks in 1973. Dr. Malcolm Sawyer is a physician at a psychiatric hospital located in the Bronx, New York. ... Read More

The Life and Contributions of the Chemist, Fritz Haber (615 words, 2 pages)

Fritz Haber was born in Breslau, Germany on December 9, 1868. Haber was the son of a Jewish merchant and was rather unimportant at the time. As a young child Haber was interested in science. He would often perform chemical experiments, sometimes even at St. Elizabeth where he went to ... Read More

An Experiment Determining the Rate of Protease Enzyme Breakdown in Various Temperatures (587 words, 4 pages)

INTRODUCTIONThere are various type of laundry detergent. Most older types of laundry detergent would use very strong soaps to wash away dirt, many of the more modern brands of detergent are trying ways that are more green for getting rid of stains. These detergents have fewer harsh chemicals and are ... Read More

The PROP Chemical and Its Relation to the Scent and Flavor of Food (940 words, 4 pages)

Introduction PROP is a chemical that is designed to explore genetic variation of taste papillae. Taste papillae are the bumps on the tongue that contain taste buds. PROP is a peripheral taste system that allows humans to detect food qualities and therefore guide food preference for sweetness, saltiness, bitterness, and ... Read More

A Study of the Effects of Varying Temperature on the Horseradish Peroxidase Enzyme (1592 words, 8 pages)

MethodsThis experimentation was constructed in order to examine the effects of multiple temperature groups upon the enzyme horseradish peroxidase, whom plays an important role in the wound healing of plants. Horseradish peroxidase is measured by a colorimetric reaction. The enzyme will catalyze a colorless liquid substrate, known as guaiacol, and ... Read More

An Experiment on the Synthesis of Zinc Finger Disruptors Via Cobalt Complexes (1113 words, 6 pages)

Zinc finger disruptors have been synthesized in the path via Cobalt complexes. There has been success in finding complexes that can selectively inhibit zinc finger proteins and stop DNA replication. There has also been research into using Nickel complexes for the same thing. This experiment involves the synthesis of one ... Read More

A Lab Experiment to Produce Benzil from Benzoin Through the Process of Nitric Acid Oxidation (570 words, 3 pages)

Lab 1 Nitric Acid Oxidation of Benzoin Part I - Purpose The purpose of the lab is to prepare Benzil from Benzoin through Nitirc Acid OxidationProcedure Mix 4 g of benzoin and 14 mL of concentrated nitric acidHeat mixture on steam bath for eleven minutes under hoodRemove from heat and ... Read More

An Experiment to Comprehend the Electrophilic Aromatic Substitution Through the Process of Carrying Out the Nitration of Methyl Benzote (462 words, 3 pages)

Lab 3 Nitration of Methyl BenzoatePart I - Purpose The purpose of the lab is to better understand electrophilic aromatic substitution by carrying out the nitration of methyl benzote Part II - Results DataSubstances UsedSubstanceAmountConcentrated Sulfuric Acid 0.6 mLMethyl Benzoate0.3 mLConcentrated Nitric Acid 0.2 mL Ice-Cold Methanol0.2 mLFormulas UsedGrams to ... Read More

A Qualitative Experiment on Orange II and Methyl Orange (1054 words, 5 pages)

Orange II Dissolve 90 g of 2-napthol with 0.5 mL of 3 M sodium hydroxide in a 10-mL Erlenmeyer flaskTransfer to the solution the suspension of diazotized sulfanilic acid Rinse the diazonium salt into the napthol solution with several drops of cold waterStir the crystalline paste thoroughly After about 5 ... Read More

A Lab Experiment on the Process of Catalytic Hydrogenation of an Alkene (547 words, 3 pages)

The purpose of the lab is to understand the process of catalytic hydrogenation of an alkene. Results DataSubstances UsedSubstanceAmountCyclohexene0.8 mL10 Palladium on Carbon50 mg ResultsDecolorization of Bromine Test 56 drops of 3 bromine in dichloromethane was decolorized in 0.10 mL of the product 20 drops of 3 bromine in dichloromethane ... Read More

A Lab Experiment to Understand the Process of Synthesis of Dibenzalacetone Through a Claisen-Schmidt Reaction (613 words, 3 pages)

Lab 5 Dibenzalacetone by the Aldon Condensation Part I - Purpose The purpose of the lab is to better understand the synthesis of dibenzalacetone via a Claisen-Schmidt reaction Procedure Place 2 mL of 3 M sodium hydroxide solution into a 10 x 100-mm reaction tubeAdd 1.6 mL of 95 ethanol ... Read More

A LAb Experiment Based on Solutions (858 words, 3 pages)

Before beginning this lab, some basic knowledge of solutions is necessary. To begin with, a solution is a mixture of two or more substances. If a substance dissociates, it means the substance breaks down into ions and becomes an electrolyte. The level of dissociation in a solution determines if the ... Read More

A Report on Five Experiments on Various Chemical Reactions (1642 words, 8 pages)

Background InfoChemical reactions are an everyday occurrence, but not everyone may realize that. There are six chemical reactions happening all around us, but this experiment will only focus on five. The different types of reactions are Single displacementreplacement, double displacementreplacement, synthesis, combustion, and decomposition. Some reactions happen to form new ... Read More

A Lab Report: Moles of Silver Ratios in Copper and Silver Nitrate Reactions (906 words, 5 pages)

Background Information See attached Mole Ratios Copper and Silver Nitrate Introduction and Background sections.Materials Needed See attached Mole Ratios Copper and Silver Nitrate Materials and Safety Precautions sections. Procedures See attached Mole Ratios Copper and Silver Nitrate Procedure section. Data Mass of silver nitrate (AgNO3)1.6 gramsMass of copper wire (initial)1.5 ... Read More

A Lab Report on the Quality and Quantity of Starch in Different Supplements (624 words, 5 pages)

The first part of the lab was done on Tuesday October 7, 2014. The second part of the lab was done on Tuesday October 21, 2014. There are two parts to this lab qualitative and quantitative. The purpose of the Quantitative experiment was to test unknown supplements for starch, protein ... Read More

A Lab Report on Testing the Rates of Yeast Fermentation (996 words, 5 pages)

Testing Rates of Yeast Fermentation Title SectionThe first part of the experiment was done on November 29th 2014 at approximately 700 pm. The second part of the experiment was done on November 12th 2014 at approximately 700 pm. The title of this lab is Testing Rates of Yeast Fermentation.IntroductionThe experiment ... Read More

The Hypothesis on the Variation of the Ph Value of Potato Homogenate in Comparison to the Ph Value of Distilled Water After the Addition of Hydrogen Chloride or Sodium Hydroxide (381 words, 1 pages)

Buffers are solutions that stop a substance from getting either more acidic or more basic. It was hypothesized that the pH of 50-mL of potato homogenate should vary less than the pH of 50-mL of distilled water after the addition of either HCl (hydrogen chloride, which is acidic) or NaOH ... Read More

A Report on the Hypothesis on the Permeability of the Dialysis Tubing to Glucose, Iodine, and Water, but Not to Starch (295 words, 1 pages)

All cells, whether they are eukaryotic or prokaryotic have cell membranes, which are permeable to certain substances such as glucose or water and through diffusion, osmosis, facilitated diffusion, and active transport these substances move through the semipermeable membrane. It was hypothesized that the dialysis tubing (our model cell in this ... Read More

A Lab Report on the Chemical Changes and Reactions of Copper (722 words, 3 pages)

Copper Cycle Lab ReportTitle The Copper Cycle Purpose In this experiment, the objective was to track copper as it underwent a series of chemical changes and reactions.Safety review Laboratory safety goggles were worn during the experiment. Closed-toed shoes were worn in the laboratory. Unused chemicals were never returned to their ... Read More

An Experiment Measuring the Relation Between Density and Sugar Concentration in Standard Sugar Solutions (326 words, 2 pages)

Chemistry Project Individual ReportIn order to find the amount of sugar solute in an unknown solution, my group decided to measure the relation between density and sugar concentration in standard sugar solutions. This was accomplished by adding either 5 or 10 grams of sugar to 50 grams of water, measuring ... Read More

An Experiment on the Bromination of an Alkene (452 words, 3 pages)

AbstractThe bromination of an alkene, a reaction where bromine is added across the double bond, is an important addition reaction in organic chemistry. (E)-stilbene was brominated with pyridinium tribromide as a reagent and ethanol as a solvent, resulting 1.296 g of 1,2-dibromo-1,2-diphenylethane and calculated percent recovery was 68.4 . The ... Read More

An Experiment Determining the Effectiveness of Different Buffer Solutions (448 words, 3 pages)

Aim The aim of this lab is to investigate and measure the effectiveness of five buffer solutions made with combinations of ethanoic acid (CH3COOH), sodium ethanoate (NaCH3COO), ammonia (NH3), and ammonium chloride (NH4Cl), sodium hydroxide (NaOH), and hydrochloric acid (HCl) by creating titration curves for the following solutionsHCl and NaOH ... Read More

An Analysis of the Lab Experiment, determining the equilibrium constant Kc (718 words, 7 pages)

The purpose of this lab is to experimentally determine the equilibrium constant, Kc, for the following chemical reactionFe3(aq) SCN(aq) FeSCN2(aq)iron(III) thiocyanatethiocyanoiron(III)When Fe3 and SCN- are combined, equilibrium is established between these two ions and the FeSCN2 ion. In order to calculate Kc for the reaction, it is necessary to know ... Read More

Informative Facts on the Element, Potassium (719 words, 4 pages)

PotassiumPotassium is not found naturally on Earth in elemental form because it violently reacts with water. But, it can be found in minerals and granite, potassium makes up 2.4 of the earths crust (Helmenstine). Since potassium accumulates in plant cells, certain fresh fruits and vegetables are great sources for potassium. ... Read More

Chemistry Essay Examples