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Chemistry Essay Examples

Essays on Chemistry

Role of Forest in Carbon Cycle
Words • 1303
Pages • 6
Carbon dioxide (CO2) is the most abundant human-influenced greenhouse gas. A greenhouse gas is found naturally in the atmosphere— in the upper atmosphere it captures sunlight energy and reflects it back to earth, in turn creating heat. This "blanket" of gas moderates the earth's temperature. With increasing levels of carbon dioxide, however, research suggests that a thicker blanket will produce global warming. Carbon dioxide is an important molecule for life. All plants that photosynthesize absorb CO2 from the air, combine…...
ChemistryDeforestationEnvironmental IssuesForestNatural resourcesNature
What if Humans Could Breathe Underwater
Words • 477
Pages • 2
For humans, it is essential to have oxygen. Oxygen helps our body full of cells make energy. On average we inhale about 12-20 times per minute. Ever since I was young I loved the water. From the swimming pool to the ocean itself. Have you ever thought what if...humans could breathe underwater? For humans to breathe underwater we could see how polluted our seas are, start a new agriculture, and finally explore all of earth waters. Humans being able to…...
HumanLife UnderwaterOxygen
Properties of Free Radicals
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At the end of the 1930s, a group of chemists proved that natural rubber degradation is due to successive and destructive attacks of atoms or unstable molecules, ie free radicals. Any matter, consists of infinitesimal particles: the atoms. At the core of these atoms are the protons and the neutrons, and the electrons rotate around it, which couple together, forming a relatively stable combination. Free radical is a molecule that has lost an electron with electric charge, eager to mate,…...
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Environmental Science: Definition, Scope and Importance
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Environment The term environment comes from the French word “environment” and means everything around us. ”. The meaning of the French word is somewhat related to “encompass” “encircle” etc(It is believed to have been introduced into the subject by biologist Jacob Van Erkul in the early 1900s). It can be living or non-living things, that constantly interact with each other and adopt themselves to conditions in their environment. In the environment, there are different interactions between animals, plants, insects, soil,…...
Environmental Degradation – An Overview
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The environment is the natural home for all living creatures. In today’s world, the growth of the population is leading to increased demand on environmental resources. Sadly, ecosystem conditions are deteriorating because of mankind’s boundless activities. Wildlife degradation is the depletion of the environment and its resources such as soil and air, as well as the extinction of species. Therefore, human beings’ infinite activities to support population growth are destroying mother earth at an alarming rate by causing air pollution…...
AgricultureChemistryDeforestationEarthEnvironmentEnvironmental Crisis
Personal Diet Evaluation
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Breakfast included eight ounces of 2% milk, two tablespoons of peanut butter, one teaspoon of chocolate syrup, one large banana, and one thirty-two grams scoop of protein powder. Lunch included one 113g can of tuna fish, one tablespoon on blue plate light mayonnaise, ten premium saltine, unsalted tops crackers, and one sixteen-ounce bottle of orange Sunkist soft drink. My snack was one 5.3 ounce of strawberry Yoplait yogurt and one sixteen- ounce bottle of Dasani purified water. Dinner consisted of…...
Transitioning to a Vegan Lifestyle
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The vegan diet isn’t just super easy to follow. It is also a great way to keep the body healthy while staying full and happy. With that said, the question arises, what exactly can you eat while on a vegan diet? And more importantly, what do you have to avoid? What to Eat What can you eat? Contrary to the myth that vegans can’t eat anything but “grass,” there is a wide range of options available to you. Besides the…...
AMDR – Macronutrient Range & Recommendations
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Comparison of typical vs Population diet AMDRs: Healthy people can consume any kind of food, but diabetes individuals should eat a specific diet which help them to stabilize their sugar levels. AMDRs recommended % for healthy people are 55% carbohydrates,15% protein, and 30% fat, however people with diabetics have different AMDRs requirements. A low carbohydrate diet helps people with diabetes to maintain their sugar levels because carbohydrates raise blood sugar levels faster. Similarly, protein and fat requirements for diabetes individuals…...
A Healthy DietCarbohydrateDiabetesNutrition
Why Nuclear Power Must Be Part of the Energy Solution
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Pages • 3
Introduction The natural resources in the world are being overexploited. As a result, the world must seek alternative resources. One resource is Nuclear energy. Nuclear energy is growing discussion for a numerous number of reasons. Nuclear energy is coming up as a great alternative however various factors support as well as oppose its growth because of the problems associated with its usage. Nuclear energy is stored in the center of an atom. Atoms makeup everything in the universe and are…...
AtomChemistryNatureNuclear EnergyNuclear PowerPhysics
What is Golf Club?
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Introduction Golf club is an item used to hit a golf ball during the golf game. In early 17th until 19th century, the golf club manufacturing in Great Britain are depends on the local materials based on the manufactures area for example hardwoods. During the 19th century, hickory is selected as shaft materials because of the mechanical properties which is high modulus, durability, low density and others. Late of 19th century, metallic alloys are introduced as latest materials for the…...
ChemistryConstructionGolfMaterialsMechanical Engineering
The sodium thiosulphate
Words • 1333
Pages • 6
The size of this activation energy is different for different reactions. I think that the concentration of a solution affects the rate of reaction because ‘the rate of reaction depends on how frequently the molecules of the reacting substances collide. A more concentrated substance has more molecules for a given volume than a more dilute substance because there are more molecules about, the frequency of the successful collisions is greater and the reaction happens faster. ’ I have predicted this…...
The preliminary experiment
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This will help ensure that the results of the experiment are reliable and ensure that the acids react with the magnesium and not the formulated oxide layer. The Acids: Choice of acids and their varying strengths was based upon the Bronston-Lowry theory. According to the Nuffield Advanced Chemistry Students' Book, acids that ionise completely at moderate dilutions are called strong acids. Consequently they tend to have a large Ka (dissociation constant) value. Weak acids interact very little with water therefore…...
ChemistryEquilibrium constantExperimentHydrogenMaterialsPhysics
The elodea specimen
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Ribulose Bisphosphate It is this light independent stage which is affected by the temperature because it involves an enzyme, Ribulose Bisphosphate Carboxylase (rubisco), which catalyses the reaction between carbon dioxide and a five-carbon sugar known as Ribulose Bisphosphate (RuBp). Enzymes are catalyst made of protein. They convert substrate molecules into products by possessing an active site where the reactions occur. The optimum temperature of rubisco is 45o C. Exceeding this temperature causes the bonds that hold the polypeptides in specific…...
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The value of the impure aspirin RfP compared with pure aspirin RfA, the difference between these two substances was only 0.64 - 0.58 =0.06, which was less than 0. 01. Because the Rf value of a compound was constant on the same plate in condition of the temperature and solvent were kept the same and the closer the value of RfP and RfA the possible these two substances were the same. So the crude product had a very high purity,…...
Size of units facilities
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Economies of scale Scale economies are based on the notion that large units are more economical because fixed costs can be spread over more units of production. The company may consider using a large unit of capacity in two cases: Firstly if the cost of building and operating large production equipment does not increase linearly with volume. A machine with twice the output rate generally costs less than twice to as much to buy and operate. Also, in larger facilities…...
Risk Assessment Involving TPH
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Risk assessment process of Total Petroleum Hydrocarbons This paper presents data in a manner that is more like a summary rather than a complex risk assessment process of Total Petroleum Hydrocarbons (TPH). This is indeed, a wide family of compounds, hence limiting the scope of the paper to undertake inclusive environmental, physical/chemical, and even health data on each and every hydrocarbon. Therefore, the paper acts as a guideline to understanding TPH, what is known about it, the probability of considerable…...
Chemicals IndustryChemistryManufacturingMaterialsPollutionRisk Assessment
Potassium Iodide
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I will use 100cm3 cylinders to measure out the solutions, and a pipette to measure the starch. Procedure Serially diluted concentrations of Potassium persulphate were measured out, starting with 10cm3 of Potassium Persulphate giving a concentration of 0.05M. A further 10cm3 of 0.05M Potassium Iodide was measured out. A beaker was taken and using a pipette, 0.1ml of starch was placed into the beaker. The beaker must be wrapped in paper to keep light out so that the temperature is…...
Of physics principles fusion
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This type of nuclear reaction for energy process produces a lot of long term radioactive waste which is quite difficult to dispose off and also there is a high probability of an event of a nuclear meltdown (a severe overheating of the nuclear reactor's core resulting in the core melting and radiation escaping).. a In all these complications of using the right source of energy, this is where the purpose of nuclear fusion research comes into picture. The smart features…...
How to protect iron from rusting
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To investigate the ability of metals to act as a sacrificial protector of iron, preventing or reducing rusting. Theory Iron oxide is more stable than iron metal, so when given the opportunity iron will be readily oxidised. Iron reacts with oxygen and water to form a hydrated form of iron(III) oxide (Fe2O3i?? xH2O), known as rust, which is permeable to air and water so the metal underneath the rust layer continues to corrode. The iron atoms readily give away two…...
Kinetic energy
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Introduction Originally Gravitational potential energy (mph) is stored in a ball before its released. as the ball falls and the speed increases The potential energy of the moving ball is changed to kinetic energy (1/2mv2) then it looses all the potential energy as soon as is touches the floor. If there is no energy loss the energy (I. e. P. E and K. E) remains the same The ball deforms and slows down as it touches the ground. Here the…...
ChemistryEnergyMechanical EngineeringNaturePhysicsWater
Human error
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Firstly, we can see from the graph that the data plotted (density and average temperature change) is a discrete set of data. This due to the fact that each point on the graph comes from a different source within the investigation (i.e.: different liquids will have different densities) Of the five substances tested, sunflower oil has the lowest density. This is correct intuitively because as we know, when oil is put into a mixture of water, not only does it not…...
The fundamental nature of matter
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The first atomic theory Postulations regarding the fundamental nature of matter have been undertaken for millennia, but it was around 400 BC that Greek philosopher Democritus laid down the first atomic theory - and for a philosopher more than 2000 years ago, he was surprisingly close. Democritus wrote that all things are composed of minute, indivisible, indestructible particles of pure matter, which move forever in empty space. What has followed since has effectively been the refinement and proof of this…...
AtomAtomic TheoryChemistryNaturePhysicsScience
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Glycobiology is the study of the structure, function and biology of carbohydrates, also called glycans, which are widely distributed in nature. It is a small but rapidly growing field, with relevance to biomedicine, biotechnology and basic research. Proteomics, the systematic study of proteins in biological systems, has expanded the knowledge of protein expression, modification, interaction and function. However, in eukaryotic cells the majority of proteins are post-translationally modified. A common post-translational modification essential for cell viability is the attachment of…...
BiologyChemistryOrganic Compounds
Enzyme concentration
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Pages • 4
If the temperature is too high then the enzyme will denature. This means that the active site will be damaged, and will no longer fit with the substrate. This means that no reaction will occur. pH Independent - If the pH is very different to an enzymes optimum pH then the enzyme can be denatured as the hydrogen ions (of which pH is a measure) can interact with the amino acid R groups and affect the way they bond with…...
The enthalpies of combustion
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Standard enthalpy change of combustion is the energy change that occurs when 1 mol of fuel is completely burnt in oxygen under standard conditions. However, it is impossible for substances to be burnt under standard conditions. The enthalpies of combustion are different depending on the number of carbons and hydrogens in each substance. For example, the enthalpy combustion for methane is -890 kJ mol-1, however the enthalpy change of combustion for ethane or propane will be greater because more bonds…...
The “Sugar Colonies”
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"Everyone knows that the colonial world was a haven for the godly, a refuge for the oppressed, a challenge to the adventurous and the last resort of scoundrels. " (A. E Smith, Colonists in Bondage: White Servitude and Convict Labour) The history and legacy of slavery is deeply intertwined within British colonial history, and is still to this day the source of some animosity between Britain and her colonies. It has always been the case that the wealthy exploit the…...
PlantationSlaverySugarWide Sargasso Sea
Chemistry determination of RAM of lithium
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Lithium reacts violently with water to give off flammable hydrogen gas and corrosive dust. Lithium hydroxide (LiOH) is a corrosive alkali. Hydrochloric acid is corrosive to the eyes, skin, and mucous membranes. Acute (short-term) inhalation exposure may cause eye, nose, and respiratory tract irritation and inflammation and pulmonary oedema in humans. Acute oral exposure may cause corrosion of the mucous membranes, oesophagus, and stomach and dermal contact may produce severe burns, ulceration, and scarring in humans. Chronic (long-term) occupational exposure…...
Calcium carbonate
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We found that the convection current for distilled water was slightly different from the current of acid rain. On the basis of our observations, the convection current for rain water moved slightly more quickly. This was evident when the tank containing the acid rain was put onto the hot plate, and it could be seen that its convection current was faster than distilled water's. This is because it takes less time than the distilled water for the particles in acid…...
AtmosphereCalcium carbonateChemistryEarthMaterialsNature
Will participants perform better in a low or high density room?
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Aim of the experiment was to see whether performance is affected by the density of a room and done in a laboratory experiment with repeated measures design; there were two conditions, high density room and low density room. Participants were 8 females aged 16 - 18 from Abbot Beyne 6th Form. Results showed that performance is affected by the density of the room, but opposite to what was predicted in the Experimental Hypothesis. (N=7, 1 tailed test, P=0.05, critical value…...
DensityMemoryPsychologyRoomScienceScientific method
Waukegan, Illinois and the Outboard Marine Corporation
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Waukegan, Illinois and the Outboard Marine Corporation From the 1940s until the mid 1970s, the Outboard Marine Corporation was the economic heart and soul of a bustling northern suburb town of Waukegan. Employing more than 5,000 workers at its peak and O. M. C was unchallenged in the community and O. M. C was allowed to do whatever they wanted as long as they continue to bring in prosperity to Waukegan. What they were allowed to do was dump millions…...
ChemistryCorporationEnvironmental IssuesPollution
Water availability
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If my experiment were to be performed over a longer period of time, for instance 24 hours, I would add a fixed amount of Sodium hydrogen carbonate to the water, thus ensuring a large enough supply of carbon dioxide. Water availability - water is also required in the photosynthesis reaction, and when it is lacking, the plants' stomata close to prevent further water loss. This closing of the stomata cells also leads to little carbon dioxide being able to diffuse…...
Waste Management In Mauritius Environmental Sciences Essay
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Mauritius has known a rapid economic growing which gave rise to a considerable alteration in the types and volume of waste generated by the different sectors of the economic system annually. One of the most of import environmental concerns both on the island of Mauritius or Rodrigues is without uncertainty the proper aggregation, storage and disposal of industrial, commercial and municipal solid waste.Human produces stuffs from its assorted activities which are normally excess and thrown off, known as solid waste…...
ChemistryEnvironmentEnvironmental IssuesManufacturingPollutionRecycling
Volumetric Analysis
Words • 1408
Pages • 6
The aim of this investigation is to find the various measurements of concentration (Also called the morality) of acid that will neutralise 1 mole of sodium hydroxide. This is found using the titration method. Prediction I predict that the volume of acid that will be used to neutralise the given solution would depend on the concentration. The more acid I add to an alkali, the more neutral it will become. If I add too much acid, the solution will not…...
ChemistryConcentrationMaterialsSulphuric AcidTitration
Vermicomposting methods
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Introduction The most widely used vermicomposting system, worldwide, is the 'bed' method, which involves applying thin layers of sanitised and partially matured compost, to the surface of beds containing high densities of earthworms. New layers of waste are applied to beds on a regular basis and the earthworms move upwards into the fresh waste to feed and to process the material. Earthworm numbers increase as more waste is applied until a limiting density is reached. Harvesting earthworms by hand The…...
BiologyChemistryNatural resourcesNatureWater
Variables affecting the rate of Photosynthesis
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Pages • 5
The variables that could change the rate of photosynthesis are: Temperature, light intensity, Co2 concentration and amount and type of weed. The variable I will change is Co2 concentration. The variable that we have changed, Co2 concentration will change the variable we measure in that the higher the concentration of Co2 is the higher the rate of photosynthesis. But at a certain point the rate of photosynthesis will level out and no longer increase. Explanation: It slows due to the…...
Utilise different carbon sources as substrates for cellular respiration
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Pages • 24
The purpose of this investigation is to compare the ability of two different strains of yeast to respire, when using different sugars as respiration substrates. Considering the lengths that have been reached to develop varieties of yeast with greater suitability and effectiveness for very particular fermentation purposes, it seems reasonable to suppose that two different strains of the same species of yeast, selected for their different fermentation properties, have developed requirements that are not uniform. As a result of the…...
Anaerobic RespirationCellular RespirationChemistryEnzymeTitration
Try Synthetic Ivory
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Pages • 2
In a time of limited resources, and with the population of the human race increasing at an alarming rate, demand for products will be at an all time high. This is why synthetic resources will become of great importance in the near future. For instance, ivory is high in price and involves the hunting of an endangered species, the elephant, this is why creating a synthetic form of this material would not only make it more affordable, it would also…...
Titration with HCl and NaOH
Words • 750
Pages • 3
Aim: Determine the concentration of a solution of sodium hydroxide solution using a standardised solution of hydrochloric acid. Health and safety: HCl/NaOH -corrosive-avoid spills, mop-up (gloves) -safety glasses -laboratory coat Pippete fillers- take care when using in case they snap when putting on the pipette Indicator -stains/poisonous Method Step 1. Wash out: i.) the pipette, with a little of the sodium hydroxide solution ii.) the burette, with a little of the hydrochloric acid solution iii.) the conical flask, with a…...
Thickness of wire
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Pages • 7
1) Switch on the Multimeter (which is connected to the Nichrome wire via the crocodile clips). Record the reading I get from the Multimeter and switch off the Multimeter. (This will save the battery, which will give me more accurate results. ) 2) Increase the length by 100mm until I reach 1000mm. This will give me a wide range of results to draw a graph.1) Repeat the whole experiment two more times making sure I use the same pieces of…...
Thermometric Titration Investigation
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Pages • 8
We have to plan an experiment which measures the temperature change accompanying neutralisation so that it can be investigated. Neutralisation is when an acid and an alkali mixed together neutralise the other. The hydrogen and the hydroxide ions bond to form water and the rest bonds to form a salt. For example in the case of hydrochloric acid and sodium hydroxide, the salt is sodium chloride. Neutralisation is an exothermic reaction, like all reactions where bonds are formed. I plan…...
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FAQ about Chemistry

What if Humans Could Breathe Underwater
...Humans being able to breathe underwater would be a chance in a lifetime. Being able to feel and live like the aquatic life while the oceans are polluted with gases, oils, and another human waste is what we need. To feel how they feel. To see how they...
Why Nuclear Power Must Be Part of the Energy Solution
...I am for the use of nuclear power for a number of reasons. Renewable energy such as geothermal energy is a type of energy that can’t expand enough to deliver the amount of cheap and reliable energy the world needs. Nuclear power stations are able t...
What is Golf Club?
...As a conclusion, carbon fiber composite can be consider as one of the best materials for manufacturing of golf club due its good mechanical properties. The failure that occurs mostly because of the human error for example poor swing technique and les...
How to protect iron from rusting
...Therefore if a piece of iron placed in the indicator rusts, a blue colour will appear. If nothing happens, there will be no colour change. If the coating is oxidised, the mixture will turn pink (as the coating's electrons will react with water and ox...

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