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Unformatted text preview: CHEM 120A – Autumn 2011 Review for Exam 2 Chapter 6 – Chemical Reactions and Quantities Section 6.1 – Chemical Reactions - Know the types of visible evidence that a chemical reaction has occurred - Know the symbols used in writing chemical equations - Write a balanced chemical equation from the formulas of reactants and products - Extra Exercises: 6.1, 6.3, 6.5 Section 6.2 – Types of Reactions - Be able to identify a chemical reaction as either a combination, decomposition, single replacement or double replacement reaction - Extra Exercises: 6.9, 6.11 Section 6.3 – Oxidation-Reduction Reactions - Be able to define the terms oxidation and reduction - Identify which species in a reaction is oxidized and which is reduced - Extra Exercises: 6.13, 6.15, 6.17 Section 6.4 – The Mole - Know what is meant by a collection term - Know Avogadro’s number (6.02 x 10 23 ) - Be able to use Avogadro’s number to determine the number of particles in a given number of moles - Calculate the number of moles of element in a formula - Extra Exercises: 6.23, 6.25, 6.27, 6.29 Section 6.5 – Molar Mass - Be able to determine the molar mass of a substance - Calculate the molar mass of a compound - Use the molar mass to convert between grams and moles - Extra Exercises: 6.31, 6.33, 6.35, 6.37, 6.39, 6.41, 6.43 Section 6.6 – Mole Relationships in Chemical Equations - Know what is meant by conservation of mass - Know what information is available from a balanced chemical equation - Write mole-mole factors from an equation - Use mole-mole factor from balanced chemical equation to calculate the moles of another substance in the reaction - Extra Exercises: 6.45, 6.47, 6.49 Section 6.7 – Mass Calculations for Reactions - Be able to calculate the mass in grams of one substance in a reaction when given the mass of another substance in that reaction - Extra Exercises: 6.51, 6.53, 6.55, 6.57 Section 6.8 – Percent Yield and Limiting Reactants - Know the difference between actual and theoretical yield - Be able to calculate the percent yield of a product, or use the percent yield to determine starting amounts - Be able to identify a limiting reactant when given quantities of two or more reactants - Use the limiting reactant to calculate the amount of product formed (moles or mass)...
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- Fall '11