Chemistry Essay Examples

  • Donate

    282 words - 2 pages

    Course Number Course Title Credit Room Professor Mon - Thurs 8:00 - 10:20 a.m. # CHM-101-01 General Chemistry I 4 G108 Aufderheide # CHM-201-01 Organic Chemistry I 4 G219 Wolf COR-201-01 Hum Nature & the Soc Order I 4 H112 Knippenberg MAT-102-01 College Algebra With Modeling 4 L200 Nardo # PHY-101-01 General Physics I 4 G100 Rulison PSY-101-01 Psychological Inquiry 4 H203 Carton Mon - Thurs 10:30 - 12:50 p.m. COR-103-01 Music and Culture 4 H114 Bohart COR-202-01 Hum Nature & the Soc Order II 4 H201 King

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    System Of Units

    322 words - 2 pages

    Dmitri Mendeleev was the first scientist to create a periodic table of the elements similar to the one we use today. You can see Mendeleev's original table (1869). This table showed that when the elements were ordered by increasing atomic weight, a pattern appeared where properties of the elements repeated periodically. This periodic table is a chart that groups the elements according to their similar properties. Many elements remained to be discovered in Mendeleev's time. The periodic table helped predict the properties of new elements. The periodic table helps predict some properties of th

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    Robert Bunsen

    583 words - 3 pages

    Robert Bunsen was born on March 31, 1811 in Gottingen, Germany. He was the youngest of four sons. Robert started schooling in the city of Holzminden, and then studied chemistry at Gottingen. Bunsen was awarded his doctorate in 1830 for a dissertation on different kinds of hygrometer. He was only 19 at this point in his life. Following being awarded his doctorate, he immediately set off on extensive travels that took him through Germany and Paris and eventually to Vienna from 1830 to 1833. All of his travels allowed Bunsen the opportunity to establish a network of contacts that would stay with

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    Henry B Eyring

    1990 words - 8 pages

    In the world we know today, there is always a few people who devote anything and everything they’ve got into something they have a passion for. In this case, Henry B. Eyring’s passion was chemistry. To most people that might seem like something that has absolutely no interesting contents, but to Eyring, it was fascinating. His will to work hard and his high degree of intellectual talent made the world of science advance dramatically. Eyring's theory of absolute reaction rates is one of the most important developments of 20th-century chemistry. Henry’s history is really one with many ob

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    Redox Reactions

    252 words - 2 pages

    REDOX REACTIONS. The formal name for a redox reaction is "oxidation reduction reaction," and you can see that "redox" is just shorthand for the words reduction and oxidation. Thus, in a redox reaction, two things happen. Oxidation and reduction. Oxidation is loss of electrons and on the other hand, Reduction is gain of electrons. Most reactions are redox reactions because atoms need to gain or lose electrons in order to be stable. All this takes place during the reaction. Redox reactions are used and occur everyday in our lives. They also happen spontaneously in nature, which brings about a

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    Forensic Chemistry

    268 words - 2 pages

    What Is Forensic Chemistry • Forensics chemistry is dedicated to the chemical analysis of matter or substances that might be important in the commission of a crime • Forensic chemists might evaluate substances that can be dangerous to others • For example a substance that looks like anthrax would be sent to a forensic chemist • Television programs like CSI, Crossing Jordan or Bones are depictions of forensic chemistry • The chemists microscopically examine and identify blood, or tissue matter, or various substances • If crime scene investigators believe if someone has been drugged, foren

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    Infrared Spectroscopy

    542 words - 3 pages

    Infrared spectroscopy is a test used to determine the structural identities of unknown chemical compounds. It can determine the identity and relative purity of compounds by measuring how much the bonds between the atoms in the compound “bend” or “stretch”. Infrared spectroscopy works based on the idea that the bonds between atoms can absorb energy and that when they do, they act similarly to springs in that they can be stretched or compressed, and can be made to bend or “wag”. IR spectroscopy can give the identity of functional groups and atoms in a compound by analyzing the frequency of t

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    Copper Lab

    2096 words - 9 pages

    Dr. Jefferson Andrews Chemical Principalities - CHEM 1101 1 October 2008 Copper, the Funnest Lab Ever. Abstract: This experiment served as a test of our individual laboratory skills in carrying out several Abstract: chemical transformations involving copper. The experiment was successful in that the Abstract: percent yield was reasonable, and we were able to recover our copper sample with Abstract: maximum efficiency ( we were able to recover all of the copper with which we began ). Introduction: This experiment involved the separation and purification of our desired product

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    Dmitrii Ivanovich Mendeleev

    1825 words - 8 pages

    Today’s Hump-Day History post has been guest written by Michael Gordin of Princeton University, author of A Well-Ordered Thing: Dmitrii Mendeleev and the Shadow of the Periodic Table, and Five Days in August: How World War II Became a Nuclear War. In presenting “The Multiple Biographies of D. I. Mendeleev”, Michael has taken the opportunity to explore whether or not we can biographically encapsulate an individual. Is it possible to write a blog post on the biography of Dmitrii Ivanovich Mendeleev (1834-1907)? This is not just an issue of whether one can shrink the life o

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    Industrial Chemist

    673 words - 3 pages

    I am interested in a job working as an Industrial Chemist. Industrial Chemists are experts on the chemical makeup and behavior of substances. It is not like research as the Industrial Chemist focuses on development and not on research. Industrial Chemists use their knowledge of applied science on chemical manufacturing processes and products. They invent, develop, and test these processes and products. Another way of saying it is that they turn raw materials or chemicals into products. For example, cosmetics, plastics and coffee whitener are all the result of an Industrial Chemists geni

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    The Mole Unit

    663 words - 3 pages

    In today's world, we all use measurements and numbers to tell how much of one thing we have. For example we say that we have one dozen eggs, or a couple of cups, or one car. Yet, in chemistry, chemist work with miniscule particles and getting the right number is tough. In one cup of water, there are 7.5*10^24 individual molecules floating around. That’s millions of trillions of molecules just in one cup. Well, how can a scientist precisely measure the right amount of material without adding too much or too little in a reaction. Amadeo Avogadro, an Italian physicist and scientist, discovered on

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    Chemistry

    428 words - 2 pages

    Chemistry is the scientific study of interaction of chemical substances[3] that are constituted of atoms or the subatomic particles: protons, electrons and neutrons.[4] Atoms combine to produce molecules or crystals. Chemistry is often called "the central science" because it connects the other natural sciences, such as astronomy, physics, material science, biology, and geology.[5][6] The genesis of chemistry can be traced to certain practices, known as alchemy, which had been practiced for several millennia in various parts of the world, particularly the Middle East.[7] The structure of

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    Mole Unit

    664 words - 3 pages

    Mole In today's world, we all use measurements and numbers to tell how much of one thing we have. For example we say that we have one dozen eggs, or a couple of cups, or one car. Yet, in chemistry, chemist work with miniscule particles and getting the right number is tough. In one cup of water, there are 7.5*10^24 individual molecules floating around. That’s millions of trillions of molecules just in one cup. Well, how can a scientist precisely measure the right amount of material without adding too much or too little in a reaction. Amadeo Avogadro, an Italian physicist and scientist, disc

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    Conflicting Theories Of Burning Phlogiston And Oxidation

    1650 words - 7 pages

    This historical case study will examine theories of burning; specifically the movement away from the theory of phlogiston to that of oxidation. Williams (2007) states that; “The development of the science of chemistry from the “science” of alchemy is a striking example of the complete revolution in the attitude of observers in the field of science.” Kisby (2004) stated that alchemy preceded chemistry and was a branch of natural philosophy whose goal was to find wealth, longevity and immortality. Alchemists worked towards finding something known as the Philosophers Stone. It was beli

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    The Haber Process

    342 words - 2 pages

    This is the process by which ammonia (NH3) is produced. The equation for this reaction is…. The symbol that you see in the middle means it is a reversible reaction. So the product can decompose back into the reactants. So optimum conditions must be selected to get the greatest yield. When the forward and backward reactions are the same, it is said to be in a state of dynamic equilibrium. The position of this dynamic equilibrium can be moved forward by changing the conditions the reaction is done in. • Pressure Increasing this will improve the yield because the forward reaction reduces

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    Enzyme Lab

    518 words - 3 pages

    Determining Properties of an Enzyme Purpose: Enzymes serve as proteins that influence the rate of a reaction. Enzymes are long chains of amino acids with complex shapes. There a variety of enzymes, each with their own function and job. The active site on an enzyme is specific to a single substrate, which can activate the energy in the enzyme. Without enzymes normal metabolic reactions would be sluggish. The purpose of this lab was to measure the extent of enzyme reaction on given substrates by means of color change. The effects of temperature and pH will be tested and their influence on the

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    Joseph Priestley Biography

    965 words - 4 pages

    Joseph Priestley Biography Born into a poor family in a village near Yorkshire, England, Priestley lost his mother at an early age and was sent to live with his aunt, a devout Protestant. He was educated at religious schools that endorsed nonconformist beliefs; he never formally studied science, but he did excel as a scholar of languages, logic, and philosophy. Priestley became a country preacher, but eventually turned to teaching. While employed at the Warrington Academy in the 1760s, he argued that school curriculums should reflect contemporary discoveries, rather than following outdated

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    Beet Cells

    614 words - 3 pages

    MATERIALS AND METHODS Part I. Temperature stresses on biological membranes. 1. Six (6) 10mm-long beet root cores of uniform diameter, using a cork borer. 2. Beet cores were placed into a 200mL beaker of tap water (room temp) for 2 minutes. After 2 minutes gently removed the beet cores and discarded the rinse water. 3. Placed each beet core into each of six clean dry test tubes. Covered tube with sealing material. 4. Placed each one of the test tubes into different climates. Test tubes were labeled before being put into the climate. One in a freezer at about -20 degrees Celsius, One in a

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    John Dalton And Robert Boyle

    460 words - 2 pages

    John Dalton: John Dalton was born in 1766 in Cumberland, England into a Quaker family. He enjoyed educated and refined women but he never married. He started his career mainly as a meteorologist and wrote books about meteorology until he realized how much chemistry related to his ideas about the atmosphere. Probably his most important contribution to chemistry is the “Atomic Theory” which he came up with in 1803. This theory states that “all matter is made up of atoms and that the atoms of a specific element have distinct characteristics and weight.” This theory was later published in Ne

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    The Synthesis Of Chloropentaamminecobalt Iii Chloride And Linkage Isomerization To Further Synthesis Pentamminenitrocobalt Iii Chloride

    866 words - 4 pages

    Chem. 317 Title: The Synthesis of Chloropentaamminecobalt(III) chloride and Linkage Isomerization to Further Synthesis Pentamminenitrocobalt(III) chloride Experimental: Ammonium chloride (.0467 mol) was diluted in concentrated aqueous ammonia (15 ml) in a 125ml Erlenmeyer flask. CoCl26H2O (.0210 mol) was then added to the ammonium chloride solution. The ammonium chloride solution was heated and stirred while 30% hydrogen peroxide (4 mL) was added drop wise. The reaction was monitored and removed from the heat once the effervescence ceased, and then was allowed to cool. Concentra

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    Neuro Linguistic Programming Evident In Conversation

    1079 words - 5 pages

    The first conversation I witnessed took place in an airport between what seemed to be two married couples standing in the queue for the flight check in. I concentrated on the two women as opposed to the two men for the simple reason they seemed to be communicating (verbally) more than the men and I felt I could gain more material from them. The first thing I noticed was their rapport. I did not need to know what their topic was to understand they were both on the same wavelength and in complete agreement with each other. Their bodily stances were both very open and non aggressive and their han

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    Lavoisier Revolution

    1516 words - 7 pages

    Historians of science often argue whether French Scientist Antoine Laurent Lavoisier's (1743-1794) systematic reforms of chemical ideas constituted a revolution in Science. Peter J. Bowler and Iwan Rhys Moros, for instance, explicitly rejected Lavoisier's "Chemical Revolution" and stated that it didn't fulfill their criteria of being recognizably modern and unique as to constitute an episode in the Scientific Revolution.l I, however, do not quite agree with their criteria. In my view, the Chemistry that emerges from the ideas has to be influential, decisive, and radically new to be termed 'rev

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    Reaction

    845 words - 4 pages

    THE EFFECT OF TEMPERATURE AND CONCENTRATION ON REACTION RATE INTRODUCTION FACTORS INFLUENCING REACTION RATE: The study of chemical reactions is not complete without a consideration of the rates at which these reactions proceed. We know that some reactions such as those between ions in solution frequently proceed very rapidly, while others proceed so slowly that the rate is not even detectable. The practical importance of these rate considerations is difficult to exaggerate. For example, a metal which is exposed to weather will undergo reactions with oxygen and water which result in

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    The Structure Of Platinum

    314 words - 2 pages

    Structure of Platinum Platinum is a crystalline solid with a cubic close-packed crystal structure which refers to the alignment of the atoms arrangement [1]. This arrangement consists of an atom at each corner of the cube and the extra atoms are packed into the sides of the cube much like that in Graphic 1 below [1]. Graphic 1 “The cubic close-packed structure is easy to see in this picture [1]” The metallic radius is 139 nm which represents the closest platinum to platinum separation (bond length) as 277.5 nm [1]. It is composed of 78 protons and 117 neutrons w

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    Jk

    650 words - 3 pages

    KARL FISCHER TITRATION What is Karl Fischer Titration? Karl Fischer titration is a widely used analytical method for quantifying water content in a variety of products. The fundamental principle behind it is based on the Bunsen Reaction between iodine and sulfur dioxide in an aqueous medium. Karl Fischer discovered that this reaction could be modified to be used for the determination of water in a non-aqueous system containing an excess of sulfur dioxide. He used a primary alcohol (methanol) as the solvent, and a base (pyridine) as the buffering agent. What is the Karl Fischer Reactio

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    Insight Into Rna Origins

    541 words - 3 pages

    UK researchers have offered new insight into the origins of RNA - and possibly life itself - by synthesising activated ribonucleotides from small molecule precursors under conditions that the team says are similar to possible geochemical scenarios on early Earth. The 'RNA world' hypothesis is a widely-held view of how DNA-based life may have originated in which RNA - a polymer of activated ribonucleotides - is thought to have preceded DNA. The theory holds that RNA acted as an information-carrying molecule that was capable of catalysing its self-replication to support early life. However, one

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    CHEMISTRY

    358 words - 2 pages

    The Importance of Chemistry in Daily Life Most people have chosen to write their essay about how chemistry has played an important role in everyday life. I have chosen to ask, how doesn’t it play a role in everyday life? The simple fact is that chemistry plays an important role in every person’s daily activities from the moment we’re born. So what role does chemistry really play in everyday life? Well, this involvement usually begins first thing each morning. Most people wake up to an alarm or radio. These common household items contain batteries, which make them very chemically dependen

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    Uga Chem Lab Exp 29

    1305 words - 6 pages

    Alex Evans Sanders Dellinger Ryan Shockney Rashaad Williams October 18, 2010 Experiment 29 Procedure Proposal In this experiment, the experimenter will be given a one gram sample of Chromite. Chromite is defined as an Iron Magnesium Chromium Oxide. The objective of this lab is for the experimenter to determine if Iron, Magnesium, and Chromium are in the unknown sample, and from these conclusions, infer if the unknown sample is actually Chromite. In doing this, multiple laboratory skills are needed, along with general knowledge on the elements comprised in the experiment to be covered

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    Enzyme Lab

    970 words - 4 pages

    Amee Kelley Biology 101 Lab Lattimore 3 October 2010 The Conditions that Effect Enzyme Activity Abstract: Enzymes are proteins that help chemical reactions happen faster. There are optimal conditions for each enzyme. The enzyme likes to work best at higher concentrations and a neutral pH. The data collected supports this idea. The results could be a little off due to errors made in the gathering of the data. Introduction: Enzymes are a type of catalytic protein.(DeHay, G. 2009) They are important to chemical reactions because they lower the activation rate and change the substrate int

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    Buisness Letter

    553 words - 3 pages

    Delima, Reygee    (Last Active:  06 Dec 2010) | Blk.45 Lot 1 P2 Washington Ave. Southille Binan, Laguna  4024, Southern Tagalog, Philippines. | Email: [email protected]  Tel:  63-00000-000000000(Home) , 9164314310(Mobile) | | Employment History | MESCO Inc | Oct 2010 - Present | | Position Title (Level) | : | Technical Support Engineer (Fresh Grad / Less than 1 Year Experienced Employee) | Specialization | : | Engineering - Chemical | Role | : | Chemical Engineer | | | | Industry | : | Chemical / Fertilizers / Pesticides | Salary | : | PHP 15000 | Work Descript

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    The Universe Of Organic Chemistry

    5272 words - 22 pages

    The universe of organic chemistry The millions of reactions performed and compounds synthesized by organic chemists over the past two centuries connect to form a network larger than the metabolic networks of higher organisms and rivalling the complexity of the World Wide Web. Despite its apparent randomness, the network of chemistry has a well-defined, modular architecture. The network evolves in time according to trends that have not changed since the inception of the discipline, and thus project into chemistry's future. Analysis of organic chemistry using the tools of network theory enables

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    Forensic Toxicology

    1208 words - 5 pages

    Jasmine Culpepper Christopher Manuel English 1010 Forensic Toxicology Forensic Toxicologists are very important to today’s society, and they are an advantage to solving crimes. Toxicology is the study of drugs, poisons, and other toxins and their adverse effects on living organisms. All chemicals are potentially toxic and any solid, liquid, or gaseous substance absorbed in excess can be extremely harmful. The duties for toxicology are examining human tissues and fluids for the presence or absence of toxic substances. They also analyze and interpret findings, and prepare reports (www.pager

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    Chemistry Of Firewors

    1425 words - 6 pages

    All year round, fireworks illuminate the night sky with countless spectacular effects in displays taking place worldwide. “People everywhere enjoy the fantastic explosions and the brilliant light displays of fireworks” (Www.Wisc.edu). Fireworks are used in many celebrations around the world. When fireworks first came into Europe they were only used for special events, such as the arrival of a king or queen from the capital or another country. “However, these spectacles are much more than just a form of entertainment. Each firework launched into the sky is a precisely formed assembly of chemica

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    History Periodic Tabel

    442 words - 2 pages

    HISTORY OF THE PERIODIC TABLE It was 1649 when the scientist Hennig Brand discovered the first element, Phosphorous and by 1869 a total of 63 elements had been discovered. As the number of elements discovered increased scientists started to see patterns in their properties and they began to form a way of classifying the elements. Between around 1770 and 1789Antoine Lavoisier wrote the first extensive list of 33 elements, however, it was discovered later on that some were actually mixtures and compounds rather than elements. In 1828, the Swedish chemist Jöns Jacob Berzelius compiled a tabl

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    Inorganic Chemistry Laboratory Manual Spring Term

    13927 words - 56 pages

    ?zmir Institute of Technology Faculty of Science Department of Chemistry CHEM 304 INORGANIC CHEMISTRY LABORATORY MANUAL Spring Term 2007 Introduction This manual has been prepared for CHEM 304 Inorganic Chemistry Laboratory and includes the experiments, which are related to the topics covered in CHEM 302 Inorganic Chemistry II course. The main purpose of this laboratory is to provide the students an appreciation for the synthesis and characterizations of inorganic complexes. It is also aimed to provide the students a degree of competence in the laboratory skills required for accurate

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    Chemistry And Art Restoration

    1170 words - 5 pages

    Chemistry and Art Restoration Art restoration is a vital part to keeping keys to past and current cultures alive. To properly restore or protect a portrait, the art of chemistry is required; there are about 120 to 140 different substances used in the restoration process. One has to break down paints into compounds and substances, some of which have not been used in hundreds of years. A painting can be restored chemically in four steps: cleaning, consolidating, aesthetic restoration and finally protection. (Lindstrom, 2002) Each of these categories is further broken down and this is wher

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    The Importance Of Hydrogen Bonding In Biology

    338 words - 2 pages

    The importance of hydrogen bonding in biology Hydrogen bonds are extremely important in biological systems. Their presence explains many of the properties of water. They are used to stabilize and determine the structure of large macromolecules like proteins and nucleic acids. They are involved in the mechanism of enzyme catalysis. Properties of Water Property | Importance | Examples | Solvent | Metabolic processes in all organisms rely on chemicals being able to react together in solution. | 70-95% of cytoplasm is water. Dissolved chemicals take part in processes such as respiration a

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    Dmitri Mendeleev

    501 words - 3 pages

    Dmitri Mendeleev was a very important in the development of chemistry. He attended school to become a chemistry professor, studied gas density and invented the Periodic Table of Elements. These were just some of the major contributions Dmitri Mendeleev made to the chemistry world. Dmitri Mendeleev was a Russian chemist. He was born in Tobolsk, Siberia, on January 27, 1834. He came from a family of 17 children and he was the youngest. In Mendeleev’s early years his father became blind, was forced to retire from his job and died unexpectedly. His mother supported the family with earnings she ma

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    Grignard Reagent

    1606 words - 7 pages

    Purpose 1. to prepare and use a Grignard regent 2. to learn about reactions of organo-halides with magnesium 3. to synthesize benzoic acid 4. to learn about the reaction of aldehydes , ketones and esters with Grignard reagents 5. to solidify organic chemistry such as crystallization , distillation and extraction Introduction This experiment is mainly based on the preparation and use of Grignard reagents. A Grignard reagent is an organo-metalic reagent. These reagents have general structure RMgX where the R group can be alkyl, vinyl or aryl group and the x is a halogen

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    Chem Lab

    841 words - 4 pages

    Introduction: In this experiment, calcium chloride was reacted with sodium hydroxide according to the following balanced equation: CaCl2(aq) + 2NaOH(aq) Ca(OH)2(s) +2NaCl(aq) The purpose doing this reaction was to perform stoichiometry calculations. Stoichiometry is the process of keeping track of the quantitative relationship between reactants and products in a reaction. In a stoichiometry problem, the coefficients in the balanced equation provide the correction number of moles of each substances that is needed to complete the reaction. Often in a reaction, there is a limiting rea

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    Valence Bonds

    347 words - 2 pages

    Valence Bond Theory: An important aspect of the VB theory is the condition of maximum overlap which leads to the formation of the strongest possible bonds. This theory is used to explain the covalent bond formation in many molecules. In the case of the F2 molecule the F - F bond is formed by the overlap of pz orbitals of the two F atoms, each containing an unpaired electron. Since the natures of the overlapping orbitals are different in H2 and F2 molecules, the bond strength and bond lengths differ between H2 and F2 molecules. In an HF molecule the covalent bond is formed by the overlap

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    Darwin

    406 words - 2 pages

    Charles Darwin Charles Darwin is known to many people as the father of evolutionary biology. He had 2 brothers and 3 sisters. He got married in 1839 and had 10 children however 2 died at infancy and one at the age of 10. He attended Revd. Samuel Butler’s school in Shrewsbury when he was 9 years old. Darwin was very interested in chemistry. At the age of 13 he acted as an assistant in a small chemistry lab in his back garden. Where he and his brother experimented with chemical reactions and producing gases. Darwin learned the proper methods of scientific experimentation while working in

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    Hplc

    725 words - 3 pages

    HPLC A flow scheme for HPLC Firstly, ensure that there is sufficient filtered solvent in the reservoir. After that, pressurize the column and switch the solvent selector on the inlet manifold at the front of the pump to the running solvent. Then, switch on the power to the pump and slowly increase the flow rate. Lastly, switch on the U.V. detector and the processing unit and display Injection of the sample Injection of the sample is entirely automated. This can be done because of the high pressures (up to 400 atmospheres) in the HPLC tube. Retention time The time taken for a partic

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    Carbon Info

    565 words - 3 pages

    History Carbon, an element of prehistoric discovery, is very widely distributed in nature. It is found in abundance in the sun, stars, comets, and atmospheres of most planets. Carbon in the form of microscopic diamonds is found in some meteorites. Natural diamonds are found in kimberlite of ancient volcanic "pipes," found in South Africa, Arkansas, and elsewhere. Diamonds are now also being recovered from the ocean floor off the Cape of Good Hope. About 30% of all industrial diamonds used in the U.S. are now made synthetically. The energy of the sun and stars can be attributed at least in p

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    Green Chemistry

    850 words - 4 pages

    Green Chemistry [Chemistry] In modern day society the need for Green Chemistry is more necessary that ever before. Due to the already exhausted means of energy, new means of energy need to be discovered and fast. One of the options which can not only sustain a lifestyle such as the one we live but also protect the environment in which we live is the practice of Green Energy. Green Chemistry is also at times referred to as sustainable chemistry, which encourages the design of products and materials through the use of environmentally-friendly aspects. This practice of Green Chemistry prevent

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    Ksp Of Magnesium Oxalate

    1064 words - 5 pages

    The Ksp of Magnesium Oxalate Abstract The Ksp for the acid catalyzed titration of the saturated oxalate is 1.8 x 10-3. Introduction In this experiment, the solubility equilibrium for the salt magnesium oxalate must be found in order to determine a solubility product constant. Solubility equilibrium is a type of dynamic equilibrium which exists when a chemical compound in the solid state is in chemical equilibrium with a solution of that compound. At the point of equilibrium the solution becomes saturated. The chemical reaction used to find this constant is as follows:

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    Green Chemistry

    284 words - 2 pages

    1990 - present: Green Chemistry Approach. During the early 1990’s a new approach to pollution prevention called Green Chemistry evolved. The basis of this approach involves the invention of new industrial processes that do not use or produce environmentally harmful substances. A landmark piece of legislation that helped to stimulate this approach was the Pollution Prevention Act (PPA) which was passed by the US Congress in 1990. This sets a US national environment policy which states that the option of first choice is to prevent the formation of waste source. Green Chemistry

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    Mendeleevs Garden

    479 words - 2 pages

    After reading “Mendeleev’s Garden” and learning about the author’s long-term fascination of the study of the periodic table of elements, it reminded me of last year when we studied the biological classification of organisms. I was fascinated with the concept of how organisms were interrelated and how scientists can study how species evolve over time. Although early scientists had discovered concepts of valency and atomic weights of elements, Mendeleev was the first person to instill order among the randomness of elements. He discovered groupings by valency and atomic weights that not only

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    Classification Of Solid Substances

    545 words - 3 pages

    Title: Classification of Solid Substances Objective: To The purpose of this lab is to classify several unknown substances into one the five categories. There Materials Used: Power supply, circuit board, Bunsen Burner, test tubes, 100mL beaker, a piece of Tin(Sn), test tube clamp, sodium chloride (NaCl), sucrose, candle wax, sand (silica), striker, four unknown compounds, acetone, deionized water. Procedure: Perform the following test and use the results to classify the unknown substances: 1. Solubility Test: The two solvents are water and hexane. Water is a polar solvent and ace

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    Oxygen

    651 words - 3 pages

    Oxygen Oxygen, gaseous chemical element; symbol O; at. no. 8; at. wt. 15.9994; m.p. -218.4°C; b.p. -182.962°C; density 1.429 grams per liter at STP; valence -2. The existence and properties of oxygen had been noted by many scientists before the announcement of its isolation by Priestley in 1774. Scheele had also succeeded in preparing oxygen from a number of substances, but publication of his findings was delayed until after that of Priestley's. As a result, Priestley and Scheele are credited with the discovery of the element independently. The fact that the gas is a component of the atmosphe

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