Experiment 18 Chemistry 101 Redox Titration: Determination of the Percentage of Iron in a Sample INTRODUCTION The concentrations of redox-active species can be determined by redox titrations. In a redox titration‚ a measured sample of the unknown is titrated against a standard solution of a substance that will oxidize or reduce the unknown. In the present experiment you will take a sample containing iron‚ add acid to dissolve it [thereby converting all the iron to iron(II)]‚ then
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Batch Reactor Aim/Objective The aim of this experiment is to compare the theoretical conversion for a saponification reaction to the experimentally determined conversion in a batch reactor under constant temperature conditions. Experimental Procedure The first step was to ensure the electrical supply to the rig was turned off and that the Armfield batch reactor was empty and clean. 500mL of 0.1M sodium hydroxide solution was then added manually. The pump and stirrer were then set to
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Classifying Chemical Reactions Introduction Pre-lab questions 1. Which reactants used in this experiment are flammable? Discuss the safety precautions that are necessary when working with flammable materials in the lab? 2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation? 3. Common observations of a chemical reaction are described in the introduction section. For each observation‚ name a common or everyday occurrence that must involve a chemical reaction
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Physical Therapists help injured or ill people to improve their movement to manage their pain; therefore therapies show an important part of the rehabilitation‚ treatment‚ and prevention of the patients with chronic conditions‚ illnesses‚ or injuries. When typically being a Physical Therapist to work in private offices‚ clinics‚ hospitals‚ and nursing homes. Therapists spend much of their time on their feet because they are actively working with each of the patients. A Physical Therapist has to at
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Overview Chemical Warfare is using the chemical properties of a substance to your advantage during war. This has been going on for centuries. Even the most basic forms of weapons were used. People have been putting poison on the end of their spears and arrows since they have been around. Over the years‚ it has also developed into much more advanced chemistry. In this article‚ I am going to focus on the more advanced‚ modern uses of chemical warfare in World War I and World War II. World War
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Chemical Reaction:- The transformation of chemical substance into another chemical substance is known as Chemical Reaction. For example: rusting of iron‚ setting of milk into curd‚ digestion of food‚ respiration‚ etc. In chemical reaction new substance is formed which is completely different in properties from the original substance‚ so in a chemical reaction chemical change takes place. Following are the signs of chemical reaction: (a) Change of state of substance. (b) Change of colour of substance
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Nickel is one of the most important elements on the periodic table. It has plenty of history‚ as well as a huge importance to society. Its has unique chemical‚ physical‚ and geological properties. Nickel is used commercially in abundance‚ as it is used anywhere from simple art products such as ceramics to complex structures such as tubing for desalination plants. It is even used in the American five-cent coin‚ the "nickel".<br><br>Nickel was discovered by Axel Fredrik Cronstedt‚ in Sweden‚ during
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BIOLOGY 22 MODULE 1 – Chemical Basis of Life v2.0 * Levels of Organization – biological functions are ultimately based on the properties of atoms and molecules * Subatomic particles – neutrons‚ electrons‚ protons * Atoms * Compounds * Complexes of compounds * Organelles – bodies within cells that perform specific functions * Cell * Specific combination of organelles * Can metabolize and reproduce * Least elaborate living structure * Significance
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INTRODUCTION Intellectual property surrounds us in nearly everything we do‚ at home‚ school; work‚ at rest and at play. No matter what we do‚ we are surrounded by the fruits of human creativity and invention. The importance of protecting intellectual property rights has received heightened recognition through the increase in world trade. It is estimated that billions of dollars of business is lost due to illegal counterfeiting. Between five to eight percent of all goods and services sold worldwide
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Continuity Equations Continuity equation is a equation that explain the transport of a conserved quantity. Since‚ mass‚ energy‚ momentum are conserved under respective condition‚ a variety of physical phenomena may be describe using continuity equations. By using first law of thermodynamics‚ energy cannot be created or destroyed. It can only transfer by continuous flow. Total continuity equation (TCE)‚ component continuity equation(CCE) and energy equation(EE) is applied to do mathematical model
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