Chemical reactions * Chemical reactions occur when substances undergo chemical changes to form new substances * Production of gas and change of color are sings of chemical reactions * Chemical reactions rearrange atoms * A reactant is a substance or molecule that participates in a chemical reaction * A product is a substance that forms in a chemical reaction Energy and Reactions * Energy must be added to break bonds. * Many forms of energy can be used to break bonds:
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Relationships in a Chemical Reaction – Lab Christian Lecce Mr. Ribarich Wednesday‚ February 20st‚ 2013 Purpose To determine the mass of copper formed when excess aluminum is reacted with a given mass of a copper salt (Copper Chloride dihydrate)‚ and the mole-to-mole ratio between the reactant and the product of a chemical reaction. Apparatus * 150ml beaker * Stirring rod * Ruler * Hotplate * Tweezers * 50ml graduated cylinder Materials * Copper (II) chloride
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Introduction‚ aim and hypothesis Chemical reactions are accompanied by the release or absorption of energy. Reactions which release energy are described as exothermic and those which absorb energy are endothermic. The energy released in chemical reactions was previously stored as chemical potential energy in the reactants; this stored energy is called enthalpy. The aim of this practical is to observe and classify chemical processes as endothermic or exothermic‚ based on the changes in temperature
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Lab: STOICHIOMETRY The reaction of Iron with Copper(II) Sulfate Purpose: In this experiment we will use stoichiometric principles to deduce the appropriate equation for the reaction between metallic iron and a solution of copper (II) sulfate. This reaction produces metallic copper‚ which is seen precipitating as a finely divided red power. Materials: Flask beaker Copper solution Balance Hot plate •150 ml beaker •1 gram of iron power
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we can learn to observe physical properties of varying substances as well as to use chemical reactions to observe chemical observe the chemical properties of varying substances. In experiment #1‚ we were able to detect physical properties of the aluminum and copper sulfate simply by looking at the substances. We then combined the two substances to see if they would create a chemical reaction and test the chemical properties. After being combined‚ bubbles and gas were created and the color of the
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Name: Yaissa Fernandez 4.05: Chemical Reactions Data and Observations: Complete a data table that includes a prediction of reaction type‚ observations‚ and identification of reaction type for each reaction in the lab. (10 points) Reactants Prediction of Reaction type Observations Reaction Type Iron (III) and Copper (II) Sulfate Solution Single replacement Solids stay concentrated at the bottom Single replacement Lead (II) Nitrate and Potassium Iodide Solutions Double replacement Yellow powder
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Finance – 419 Scrap #29 Principles of Managerial Finance‚ by Lawrence J. Gitman. Published by Addison Wesley. Copyright © 2006 by Pearson Education‚ Inc. Individual Assignment 1: Assignments from the Readings • Resource: Principles of Managerial Finance • Prepare responses to the following problems from the text: o Problems P5-3‚ P5-4‚ and P5-13 (Ch. 5) o Problem P10-4
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Chemical reactions are a part of everyday lives. Whether it is the burning of propane at a kitchen stove‚ or washing detergent reacting with dirt stains‚ chemical reactions are useful tools that have widespread applications. With so many reactions assisting our everyday activities‚ it is important that ways to optimise reaction rates are investigated. “Reaction rate‚ the speed at which a chemical reaction proceeds… may be defined in terms of the amounts of the reactants consumed or products formed
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Determining the Stoichiometry of Chemical Reactions Mrs. Farrales Nikita Pandya October 23‚ 2012 December 3‚ 2012 INRODUCTION In the method of continuous variations the total number of moles of reactants is kept constant for the series of measurements. Each measurement is made with a different mole ratio of reactants. A mole ratio
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Section Assignment 3.4 Part F – The Reaction of Iron Nails with a Copper Solution Introduction: The experiment in this activity involves the reaction between a copper (II) chloride solution with iron nails and the mole ratios involved in the reaction. Measurements are taken to determine the moles of each reactant involved in the reaction and thus the number of atoms or molecules involved. Apparatus and Materials: Refer to the reaction of iron nails with a copper solution assignment in Module 3
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