Chemistry 217 Dr.Rudolf Rednose Tues/8am/S-473 Determining the Percent Oxygen in the Air INTRODUCTION: Recent tragedies in coal mines have exemplified the importance for us humans to breathe an adequate amount of oxygen if we are to survive. But what amount of oxygen is adequate? How can we know the amount of oxygen present in what we consider fresh air? The purpose of this experiment was to determine the percent oxygen typically present in air. The conclusion of the test suggested that
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Clays are one of the important natural materials‚ which have been examined for catalytic applications. Clays are characterized by a layered structure and hence they are slippery when wet. They are broadly classified as cationic or smectite type (having layer lattice structure in which two-dimensional oxyanions are separated by layers of hydrated cations) and anionic or brucite type (in which the charge on the layer and the gallery ion is reversed complimentary to smectite type). Anionic clays are
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Chemical Reactions Chemical Change • reorganization • original substances form new substances with different formulas • may or may not involve a change of state • symbols used to describe chemical reaction are known as a chemical equation • Chemical equations do not have equal signs (=) they have an arrow Chemical Equations • Must follow the Law of Conservation of Matter • atoms can neither be created or destroyed during a chemical reaction • What
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chain respectively. The Krebs cycle uses the two pyruvates produced in glycolysis to make 2 ATPs per glucose and energy. This occurs through the oxidation of a pyruvate‚ wherein one of the three carbons will bond to oxygen and leave the cell as carbon dioxide (CO2)‚ leaving a two-carbon molecule called acetyl coenzyme A.
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put it through a series of reactions that change it¡¦s state of matter and chemical formula‚ but in the end‚ we will return it to it¡¦s normal solid state. Determine the percentage yield (quantitative). Define what happen at level of electron for oxidation/reduction‚ double replacement‚ neutralization and decomposition. There are five reactions that the copper will go through. 1. Cu(s) + 4HNO3(aq) --- Cu(NO3)2(aq) + 2H2O(aq) + NO2(aq) 2. HNO3(aq) + NaOH(aq)--NaNO3(aq) + H20(l) 3. Cu(OH)2(s)--CuO(s)
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Primary alcohols undergo oxidation to form carboxylic acids in two stages‚ it forms an aldehyde and then to the acid. In this experiment‚ we are used to prepare benzoic acid from benzene. Potassium permanganate is used this operation as an oxidizing reagent‚ it is used to oxidize the benzoic acid as well as acting as a catalyst for the reaction. Potassium permanganate (KMnO4) is a very strong oxidant which is able to react with many functional groups‚ such as secondary alcohols‚ 1‚2-diols‚ aldehydes
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Abstract Chemical reactions can be used to produce electricity and electricity can be used to cause chemical reactions through oxidation-reduction reactions. The first part of the experiment measures the standard electrode potentials of five various half cells against the Cu2+(1M)|Cu half cell. The last three half cells are prepared through electrolysis. The electrode potentials of all reactions are positive which means that they are spontaneous. There is a significant percent difference from the
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__________Abstract- The synthesis of adipic acid has been a growing topic of discussion due to the harmful impact it has on the environment. To aid in elucidating an environmentally friendly approach‚ the synthesis of adipic acid via a greener oxidation reaction and a recyclable catalyst will be examined. This article will discuss how manipulating equivalents of 30% hydrogen peroxide (H2O2) affect the product yield. Results show product yield was affected when changing H2O2 equivalents. Equivalent
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treatment. The review emphasizes adsorption/catalytic oxidation process‚ adsorption/catalytic reduction process‚ adsorption coupled with redox process‚ biomimetic sorbent and its sorption behaviors of POPs‚ and modified adsorbents and their water purification efficiency. Key words: adsorbents; adsorption; pollutants; water purification *Corresponding author. E-mail: jhqu@rcees.ac.cn. 1 Adsorption/catalytic oxidation process Adsorption/catalytic oxidation process can be divided into two categories: in
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DNA 2. oxidations of polydesaturated fatty acids in lipids 3. oxidations of amino
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