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Readers ages 7 to 10 will learn about chemical reactions taking place all around us. Find out what happens when different atoms and molecules come in contact with each other. Includes 25 hands-on STEM activities, fascinating facts, essential questions, and more!
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This program begins with an overview of the basic concepts of chemical equilibrium: reversible reactions, Le Chatelier's principle, the equilibrium law, and the calculation of K. It then analyzes how changing conditions other than temperature leads to a temporary shift in the position of equilibrium and how reactions spontaneously adjust to maintain the value of K for any given temperature. Changes in K when increasing and decreasing the temperature...
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In this program, stoichiometry goes swimming. The topics of molarity, dilution, acid/base reactions, titration, limiting reagents, and yield-theoretical, actual, and percent-are all carefully examined. Practical problems involving the Molarity Equation give the program a quantitative analysis flavor, while "Cooking with Professor Rowley" and other skits present key stoichiometric concepts with a dash of levity.
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This program is designed to introduce students to the chemistry involved in the process of corrosion. After illustrating how iron is refined and steel is made, Corrosion Chemistry explains the causes of corrosion, necessary conditions for corrosion to occur, which metals will corrode, redox reactions, galvanic cells, and corrosion minimization. Laboratory experiments and animated graphics are interspersed throughout.
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This program heats things up with a concentrated analysis of thermochemistry, explaining precisely how temperature figures into chemical reactions. Section one covers endothermic and exothermic reactions, the standard enthalpy of formation, and the workings of Hess's Law, while section two explains the concepts of heat capacity, molar heat capacity, and specific heat.
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Starting with a definition of reversible reactions, this program covers the basic concepts of chemical equilibrium and the equilibrium law. The concept of equilibrium is illustrated by comparison to the movement of cars in and out of a parking lot, the motion of a person walking the opposite way on a moving walkway, and the movement of people on and off paddleboats. The video concludes by considering what an equilibrium constant indicates about a...
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Chemical changes occur around us, and inside us, all the time. When chemical reactions happen, one or more new substances are formed and energy is either given off or absorbed in the process. Spontaneous chemical reactions, those that occur naturally under favorable conditions release free energy, meaning they are exergonic. Endergonic reactions, by contrast, require net energy input to make the reaction happen. This resource explores energy associated...
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Featuring lab demonstrations, engaging graphics, and clear explanations, this program explains the chemistry of electrolysis. Viewers learn the industrial applications of electrochemistry, including brine electrolysis, aluminum production, electroplating, and anodizing. The program also compares galvanic cells and electrolytic cells, and discusses the many applications of rechargeable batteries such as lead-acid, NiMH, and lithium-ion, before concluding...
12) Acids and bases
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Use this video to familiarize students with the properties of acids and bases. Beginning with an overview of how these two kinds of chemicals react to or neutralize each other, the program explores Arrhenius's ideas on ion release and Lowry and Bronsted's theory of proton exchange. Details on the pH scale, indicators, conjugate bases, and Lowry-Bronsted reactions are featured along with numerous examples of acid and base applications-cleaning agents,...
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What do fireworks, a fried egg, and a rusting truck have in common? They all involve chemical reactions. This program illustrates the mechanics of chemical reactions in five sections: Chemical Reactions (reactants and products, state changes, diatomic elements and molecules, Law of Conservation of Mass); Chemical Bonding (Octet Rule, ionic and covalent bonds); Types of Chemical Reactions (synthesis and decomposition reactions, single and double displacement...
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An explanation of the theory of infrared absorption is followed by showing a series of spectra demonstrating the major absorption peaks. Shifts within the carbonyl group, and their explanation, are discussed. The N.M.R. portion of the program covers the ideas of integration, chemical shift, and splitting in proton spectra in a logical process of development of the subject.
15) 13C N.M.R
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The importance of the low natural abundance of 13C is stressed in this program, showing how it influences the development of the subject. The program covers types of decoupling, the effect of chemical shift, and the effect of deuterium and 13C labels.
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Water is a unique chemical. Without it, life as we know it cannot exist. It exists in all three phases naturally on Earth. At first glance, the chemistry of water appears a very simple, but it has some remarkable and unique properties, because of its molecular structure and composition. This production examines some of water's important chemical properties, including its polarity and the strength of bonds between water molecules, dispersion forces,...
18) Fuel Cells
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Outlining the basic chemistry and construction of fuel cells, this program traces their development from the alkaline fuel cells vital to the U.S. Space program. It discusses the alkaline fuel cell, considers fuel cells and transport and the hydrogen economy, and discusses fuel cells and batteries for electric cars. The program also considers carbon footprints, stationary power, CHP, and portable fuel cells.
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This program explains the essential features of redox reactions and their importance both in nature and in industry. It explains what a redox reaction is, discusses oxidation numbers and how they are used, illustrates how a redox reaction can be seen as the sum of two halves, and teaches how to balance equations in redox reactions. The program presents an example of the combustion of methane.