Free essays on chemistry are educational resources that allow individuals to learn more about the science of chemistry at no cost. These essays cover a wide range of topics, from basic concepts in chemistry to more complex scientific theories and experiments. They provide insights into the chemical properties of various elements and compounds, the history of chemistry and its contributions to society, and the latest developments in this field. By reading these essays, students can deepen their understanding of chemistry and gain valuable knowledge that can help them in their academic and professional pursuits.
A Compare And Contrast Essay About Two Poems
Write an essay of 1500 words, in which you compare and contrast the following two poems: Samuel Taylor Coleridge’s ‘Frost at Midnight’ and Joanna Baillie’s ‘A Mother to her Waking Infant.’ In comparing and contrasting the two poems, it is logical to firstly acknowledge the titles, and to think about how they shape the way we read, and how they set the readers expectations. Baillie’s title of ‘A Mother to her Waking Infant’ is very clear and factual, and fully describes…...
ContrastLiteraturePoemsPoetry
Wittig Reaction Lab Report
Witting discovered the route to alikeness through yield molecules (1). Witting was educated originally at Tubing; Witting spent periods at Brainwashing, Prefigure, back to Tubing again before taking up the post as director of the organic chemistry department at Heidelberg (1 Witting became an emeritus professor in 1967, where he remained until the end of his notable career (1). In 1967, he won the Otto Hahn Prize, and in 1979, he and Herbert C. Brown were jointly awarded the Nobel…...
Chemical ReactionChemistryMaterials
Transpiration Lab
When water is transported from the roots to the mesosphere cells in the leaves, it is evaporates out the stomata, called transpiration, to create a lower osmotic potential. Osmotic potential is the part of the water potential of a tissue that results from the presence of solute particles. Even though the stomata open to release water, it also brings in carbon dioxide to produce sugar and oxygen through a process of photosynthesis. The water absorbed by the roots is moved…...
BiologyChemistryOsmosisPlantsWater
Save time and effort. Get incredible results with the help of our writers.
Hire a Pro to Write You a 100% Plagiarism-Free Paper.
Get My
Paper
Kool Aid Chromatography
When working in a lab, scientists often need to identify different molecules that are present in a sample they are studying. There are many ways to identify unknown molecules/chemicals in a sample. The method you will be using today is called Paper Chromatography and consists of 2 steps. First, you will separate the unknown chemicals and then you will identify them. This process can also be applied to the food we eat everyday.When you eat food or drink liquids you…...
ChemistryChromatographyColorWater
Beam Deflection Lab Report
When loads are applied to a beam their originally straight axes become curved. Displacements from the initial axes are called bending or flexural deflections. The amount of flexural deflection in a beam is related to the beams area moment of inertia (l), the single applied concentrated load (P), length of the beam (L), the modulus of elasticity (E), and the position of the applied load on the beam. The amount of deflection due to a single concentrated load P, is…...
Civil EngineeringConstructionExperimentMechanical EngineeringPhysics
Wet Process In Plastic Road Construction
What is plastic? A material that contains one or more organic polymers of large molecular weight, solid in its finished state and at some state while manufacturing or processing into finished articles, can be shaped by its flow. Types of plastics 1. Thermosets. 2. Elastomers. 3. Thermoplastics. NATURAL RESINS solids or semi solid materials light yellow to darkbrown in colour carbon, hydrogen and oxygen. globules on the bark . SYNTHETIC RESINS derived primarily from petroleum. polystyrene, polyesters and acrylics sed…...
Materials
Acceleration Due To Gravity Lab Report
This lab was designed to calculate the acceleration of gravity using the Smart Timers. The theory predicts that g = CACM/so. In the class, the “g” most time is considered to be 9. Mm/so. Materials Yellow plastic ball The Smart Timers Iron Bracket Clamp Target pad Photostat The yellow plastic ball is as subjects. Iron Bracket use to constant the height, and clamp use to stable the Smart Timers attached on the Iron Bracket. The Smart Timers is use to…...
ExperimentForecastingGravityPhysicsScientific Method
Calibration Of Glassware
This experiment must be repeated three times or more and take the average reading to get more accurate data. By using the formulae, the standard deviation and relative standard deviation could be calculated. As the result, the lower the standard deviation, the higher the consistency of an instrument. Although the instrument may measure a given sample, the value might need to be altered due to various conditions and errors. Objectives The objective of the experiments was to; Calibrate a 10…...
Experiment
Road Rage Essay
This experiment aimed to investigate road rage reactions in drivers. It used a 2×2 independent group’s factorial design. The independent variables were vehicle status and participant gender. The dependent variables were the duration of any verbal road rage reactions made by participants, participants questionnaire scores on the Propensity to Angry Driving Scale and participants heart rate’s before and after the experiment. The main hypothesis is that duration of verbal road rage reactions will be affected as a result of participant…...
ExperimentGenderScientific Method
Acid Base Titration Lab Report Discussion
This allows for quantitative analysis of the concentration of an unknown acid or base solution. It makes use of the naturalization reaction that occurs between acids and bases and the knowledge of how acids and bases will react if their formulas are known. Acid-base titration can also be used to find percent purity of chemicals. When a weak acid reacts with a weak base, the equivalence point solution will be basic if the base is stronger and acidic if the…...
ChemistryPhTitration
Confounding Variables Can Bias Your
This bar chart shows participants recalled less amount of words (vertical axis) from List A in the same context (horizontal axis), compare to amount of words recalled in List B, different context. This rejects the directional hypothesis which stated participants would be able to recall more words in the same environment by using same context as retrieval cue to aid recall. Discussion The results show higher recall rate in different context; 12 words (mean number) recalled accurately from List B…...
BehaviorBiasExperimentResearchScientific Method
Density Of Water Experiment Lab Report
There are significant overlaps, however. The following are some observations about the numerical values of densities that should prove useful in problem solving situations. Solid densities: from about 0. 2 g/cam to 20 g/cam. Liquid densities: from about 0. 5 g/ml to 3-4 g/ml. Gas densities: mostly in the range of a few grams per liter. In general, densities of liquids are known more precisely than those of solids. Also, densities of elements and compounds are known more precisely than…...
ChemistryDensityNaturePhysicsWater
Yeast Lab Report
The yeast breaks down sugars in the dough through glycoside and alcohol fermentation and produces a small amount of AT P, will also release carbon dioxide. The carbon dioxide produced by alcoholic fermentation causes the dough to rise. Carbon dioxide is made by yeast as a waste product and the quantity of carbon dioxide is a sign of growth. Yeast organisms’ size and quick reproduction make them great for testing different factors such as temperature, which is what will be…...
Carbon DioxideCellular RespirationChemistryOxygenSugar
Cannon Experiment Trial 1 Comparison
The two pictures below demonstrate the calculations from Trial 1 at 00 and Trial 1 at 450. In this experiment we did five separate shots from the cannon at 00, and 3 separate shots at 450. We determined the average distance of the shots from each angle by using a meter stick. We were then able to calculate the velocity of the shots by dividing the time from distance. After getting the results, the distance from the shots fired at…...
CommunicationExperiment
Compare And Contrast Essay Between Two Countries
The two countries that I’m going to compare and contrast their Demographic Transitions with each other are England and Wales, being the MECD, and Sri Lanka, being the LECD. Differences The main difference between the two demographic transitions is that the demographic transition for Sri Lanka is entirely a twentieth century occurrence. The data starts at 1911 – 1920 where the demographic transition for England and Wales starts at 1651 – 1680. This is a lot earlier. The CDR in…...
ContrastHygieneMalariaPublic Health
Zinc And Hydrochloric Acid Lab Report
The theory behind this experiment is the heat of a reaction (AY) plus the work (W) done by a reaction is equal to the enthalpy (AY-A) of said reaction. The purpose of this lab is to calculate the enthalpy of a reaction between zinc and hydrochloric acid through the equation AY+W, which can also be written as AH=mica + PA. M is the mass of what is being measured in grams. C is the heat capacity which is “the amount…...
Chemical ReactionChemistryHeatPhysicsThermodynamics
Refraction Of Light Lab
The results we obtained show that on average, we calculated a sin i over sin R to be 1.34 units. Also we can say that as the angle of incidence increased, the angle of refraction tended to increase proportionally. As the sin of i increased, the sin of R also increased. Below you can see the exact relationship between the sin of the incidence angle (i) versus the sin of the refracted angle (R). To find the slope of the…...
DataExperimentLightWater
Bread Mold Experiment Hypothesis
The purpose of this lab was to test the effect of water on bread mold growth. Hypothesis: hypothesized bread mold would grow faster if the bread was exposed to water. Materials: 1. Bread 2. Plastic cup 3. Water 4. Rubber band 5. Plastic wrap 6. Light 7. Scale 8. Seizers Procedures: Day 1 1. Cut two pieces of bread 1 belly 2. Place the beard in two separate cups 3. Put 1 1 drops of water on one of the…...
ExperimentHypothesisPlasticResearchWater
Enzyme Activity Lab Report
The reactant an enzyme acts on is referred to the enzyme’s substrate. The enzyme will combine with or to its substrate. While the two are joined, the substrate is converted to its product by catalytic action of the enzyme. There is an active site of the enzyme molecule which is a restricted region that actually attaches to the substrate. Usually the active site is formed by only a few of the enzyme’s amino acids, the rest is just the framework…...
ChangeChemistryEnzymePh
Osmosis on De-shelled Egg
The purpose of this experiment is to show the effects of osmosis on the De-shelled egg. I hypothesize that the egg will increase in size in the vinegar and shrink in the syrup, staying relatively the same size in the water. Methods: Fresh boiled and shelled eggs is used in this experiment. The eggs were soaked in vinegar for up to 48 hours and no less than 24. At the end of this period the eggs are dried off and…...
ChemistryOsmosisWater
Ethanedioic Acid Crystals
The purpose of this experiment is to determine the concentration of odium hydroxide solution by titration against the primary standard, ethanedioic acid-2-water.IntroductionTitration is a method of analysis that to determine the precise endpoint of a reaction. In a titration, solution was run from a burette into a definite volume of another solution in a conical flask. 1 or 2 drops od suitable indicator (phenolphthalein) is added to indicate the end point. The end point is the stage at which two…...
ChemistryMaterialsTitration
Empirical Formula Lab Report
The molecular formula represents the number of all elements in a compound. The empirical is the simplest whole number ratio of the elements in that compound. Combustion reactions always involve oxygen and are almost always exothermic. Exothermic reactions give off energy in heat form. The purpose of this experiment is to find the empirical formula of a compound using whole numbers. To investigate this experiment, the masses of the metal and gas were measured to obtain the empirical formula of…...
Chemical ReactionChemistryFireMaterialsWater
Pharmacology Laboratory Experiments
The following sample essay is about pharmacological laboratory experiments. To read the introduction, body, and conclusion of the essay, scroll down. The functional studies provided information regarding the presence of musician cholesterol that mediate contraction only. Thus radioing binding techniques were also employed to determine which musician cholesterol subtypes were present and their relative densities. In vitro functional studies: Experimental protocol l: The intent of this experiment was to determine the relative potteries of selected incurring clinometers Zionists. The stock…...
BiologyChemistryExperiment
Vitamin C Lab Report
The following graph shows this relationship even more clearly. The plots were joined using a trend line so that the trend can be seen more clearly, Graph 2: Concentration of ascorbic acid (M) against Volume added to decolonize DUCKPIN The following graph shows that the concentration of ascorbic acid (5) in the rest fruits (indicated by the blue diamond-shaped dots) is higher than the concentration in processed fruit juices (indicated by the blue squares). All the points in the fresh…...
ExperimentLemonPineappleResearchVitaminVitamin C
Lab Report of Yeast Respiration Experiment
The experiments tested yeast respiration in both, warm water at 42 degrees Celsius and at room temperature. The outcome of the experiment indicates the warm water is optimal for yeast respiration in comparison to cold water. Introduction Respiration is the process that converts sugar known as glucose to energy, in this case TAP (Adenosine Troposphere). This process is found in all living organisms. Respiration can occur in two ways, aerobic and anaerobic. Aerobic respiration requires oxygen to produce energy. Anaerobic…...
Anaerobic RespirationCarbon DioxideCellular RespirationChemistryOxygenWater
The Effects of Detergent Concentration on Mung Bean Germination
At first read article about money and life here. Problem: What is the effect of 7th generation detergent on mung beans. How will the 7th generation detergent affect the mung beans. Background research: The detergent I used was the 7th generation only 5% on mung beans. Doing this research we used 10 mung beans but in the end only 9 grew and 1 didn?™t grow. Focus On: 1. We are choosing liquid detergents because we wanted to see the outcome…...
ChemistryMaterials
Temperature affects the fermentation of the yeast
The chemical reactions within yeast are facilitated by enzymes; most enzymes optimal temperature range is warm. The warmer the water, the more the enzymes are in their optimal temperature angle and the more efficiently they catalyst chemical reaction; this makes the fermentation proceed more quickly. In this experiment, the effect of variation of temperature on the fermentation of yeast was tested. If temperature affects the fermentation of the yeast, then the rate of yeast fermentation will change with the different…...
BalloonChemical ReactionEnzymeExperimentWater
Accent Perception
The aim of the experiment is to see if people make stereotypical judgements of other people based upon their accents. Various studies prior to this one have looked into this area of research for example, Strongman and Woosley (1967). They recorded two people reading out a passage, firstly in a Yorkshire accent and then again in a London accent so it actually sounded like four different people when in actual fact there were only two. 110 subjects took part in…...
BehaviorCommunicationExperimentHuman NatureHypothesisPerception
Rubber Band Hypothesis
The aim of this experiment is to find how the amount of stretching, when shooting a rubber band, affects the length of the shot. Hypothesis When you stretch an elastic rubber band, you store potential elastic energy inside it. When the rubber band is released, the potential elastic energy will be transformed into the same amount of kinetic energy. This will cause the rubber band to move, and the more kinetic energy we have, the longer the rubber band will…...
EnergyExperimentPhysics
Flame Test Lab Report
Test Lab was an experiment designed to show how elements react when heated. This Lab attempted to prove that when electrons are excited and then calm, they emit a color specific to the element. This test showed that there is a direct coloration between the heat energy being expelled and the movement of electrons from one energy level to the next. When the atoms of a gas are excited, in this case by heating, their electrons are able to move…...
ChemistryColorEnergyLightPhysics
The Neutralization Reaction Between H3po4 And Naoh In An Aqueous Solution
Strength of Acid and Alkali, Reacting Masses, Volumetric AnalysisIn which of the following cases may it obtain a complete neutralization?(1)25.0 cm3 of 0.120 M sulphuric acid and 50cm3of 0.120M sodium hydroxide solution(2)50.cm3 of 0.5 M Sodium hydroxide and 0.025 moles of aqueous ammonium chloride(3)20.0cm3 of 0.100M phosphoric acid and 30.0cm3 of 0.200 M potassium hydroxide solution(4)Dissolve 0.2025g of solid sodium hydroxide in water and make up to 250cm3 of solution, then 25.0cm3 of this solution is added to 50.0cm3 of…...
ChemistryGmoMaterials
Transcription And Translation Quiz
Study Guide 3/1/11 1. Describe the three parts of a nucleotide and how they bond to form a nucleotide. The three parts of a necleotide are a carbon sugar, a phosphate group and a nitrogenous base. The carbon sugars bond to the phosphate groups by covalent bonds while the nitrogenous base bonds with it’s compliment by hydrogen bonds. 2. Summarize the role of covalent bonds and hydrogen bonds in the structure of DNA. The role of covalent and hydrogen are…...
Materials
Essay On Stress And Strain
Several mechanical properties of materials that are important in design are ascertained by applying tension, compression or shear load on the material. Of the three, the most common mechanical stress-strain tests are performed in tension (Callister, 1997). When performing tensile tests, the load and elongation are measured in relation to the cross-sectional area or original length of the material (before the elongation). These geometric factors are normalized to the respective parameters of engineering stress and engineering strain. When a specimen…...
ChemistryCivil EngineeringMaterialsMechanical EngineeringMental HealthPhysics
Ficaria Seaways
Seaways An exhaust gas scrubber has been installed on-board the DFDS vessel Ficaria Seaways to reduce emission of SOx. The main environmental concern with emissions of SOx , which leads to formation of acid raid and production of ultrafine particles in the atmosphere, some of these particles are born by the wind to land and can penetrate human lungs. These ultrafine particles are created when SO2 comes in contact with the oxygen in the air and oxidizes into SO3. To…...
ChemistryMaterialsSeaWater
Isometric Growth
Scientific Investigation: Designing an Experiment Jeremy Barrett BIO-III February 4, 2015 Introduction Different parts of the body of an organism have been observed to grow at different rates during development. When parts of the body grow disproportionately to one-another, we call it limerick growth. The term, isometric growth, is used when describing body parts which maintain the same ratio throughout development. The purpose of this experiment is to determine whether two chosen body parts of classmates, arm and head, have…...
CommunicationExperimentScientific Method
Goldfish Lab Report
Respiration can be experienced through several structures such as the lungs, tracheae, gills, and integument in order to obtain oxygen. All organisms that experience respiration are either endothermic or isotherms. Isotherms are animals that depend on their environment for body temperature. These animals respond to changes in their environment in order to maintain homeostasis, the stable, internal conditions of the organism. Animals that are warm-blooded and can regulate their body temperatures internally regardless of their environment are endothermic. For isotherms,…...
ExperimentFishHypothesisRespiratory SystemWater
Penny Lab Report
Research Question: What is the percent composition of Copper and Zinc in a positive penny? Aim: The purpose is to determine the percent composition of Zinc and Copper metals in a post-1983 penny with the use of HCI. Variables: Independent Variable: percent composition of Zinc. Dependent Variable: percent composition of Copper. Controlled Variable: Military of HCI, and year tot penny. Apparatus: Beaker Goggles penny Distilled Water Method: Note that HCI is an acid and must be cautious around this acid…...
CopperExperimentResearch
Kepler’s 3rd Law
Research Question: Is it possible to verify Kepler’s 3rd law using a database? Hypothesis: I believe that it is possible to verify Kepler’s 3rd law using a database due to the nature of the law. Kepler’s law states that the square of the time of one orbital period is directly proportional to the cube of its average orbital radius. Mathematically this looks like: Where T is the orbital period and R is the orbital radius. As a result we can see that: In…...
ExperimentPlanetResearchTime
Candle Experiment Lab Report
Record as many observations as you can. . After that, light the candle. Observe the candle when it’s burning for at least 5 minutes. Record. 4. Blow the candle out. Observe the candle until no more changes are taking place. Observation before burning: + white *solid + the wick is black (got burned) +smell fresh Observation during burning: *fire *yellow on the very top of the wick, blue at the bottom + melting -; clear liquid *hot Observation after burning:…...
ExperimentLightOxygen
Lead Nitrate And Potassium Iodide Lab Report
Reactions Lab * November 14, 2010 Double Replacement Reaction Introduction / Purpose: The purpose of this experiment is to combine a solution made of potassium iodide and a solution of lead (II) nitrate and produce a precipitate. The reaction is listed as Pb(NO3)2(aq)+2KI(aq) 2KNO3(aq)+PbI2(s). The contents of the beaker was the solution of potassium iodide and lead (II) nitrate. The solution was poured into an Erlenmeyer flask holding a Buchner funnel with a piece of filter paper at the bottom…...
Chemistry
We've found 595 essay examples
on Chemistry
24/7 Support