Chapt 3 notes

# Chapt 3 notes - CHAPTER 3 FORMULAS, EQUATIONS, AND MOLES...

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27 CHAPTER 3 FORMULAS, EQUATIONS, AND MOLES Chapter Learning Goals A. Balanced Chemical Equations 1. For simple chemical reactions, write and balance chemical equations. B. Formula Units and Moles 1. Calculate molar mass. 2. Interconvert grams, moles, and numbers of formula units. C. Stoichiometry 1. Determine the number of moles and grams of one reactant needed to react with a given number of moles and grams of another reactant and the number of moles and grams of product(s) that result from the reaction. 2. Calculate percent yield. 3. Calculate the number of grams of products produced from a given number of grams of reactants when the theoretical yield is less than 100%. 4. Identify the limiting and excess reagents in a reaction mixture. 5. Determine the number of grams of excess reagent remaining at the end of a reaction and the number of grams of product(s) produced. D. Chemical Reactions Performed in Solution 1. Describe how to prepare a solution of known molarity by a) dissolving a solid in a solvent and b) diluting a more concentrated solution. 2. Interconvert solution molarity, solution volume, solute moles, and solute grams. 3. Determine the volume of one reactant needed to react with a given volume of a second reactant. E. Elemental Analysis 1. Determine the percent composition and empirical formula of a compound. 2. Understand how to use combustion analysis to obtain the empirical formula of a compound containing carbon, hydrogen, and one other element. 3. From empirical formula and molar mass, determine the molecular formula of a compound. Chapter in Brief The central concern of chemistry is the change of one substance into another. As a consequence, chemical reactions are at the heart of the science. In this chapter, you begin your study of chemical reactions by learning how to balance chemical equations. Using balanced chemical equations along with the concepts of the mole and stoichiometry you will learn how to calculate the amounts of reactants needed and the theoretical amount of products produced in a reaction. These calculations are carried out using molar masses for gram mole conversions or molarities for mole volume molarity conversions. You will also learn how to determine an empirical formula from the percent composition of a compound and vice versa. Finally, you will see how combustion analysis, a type of elemental analysis, along with mass spectrometry can be used to determine both the empirical and molecular formula of a compound.

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Chapter 3—Formulas, Equations, and Moles 28 LECTURE OUTLINE Balancing Chemical Equations A. Balanced equations — the numbers and kinds of atoms on both sides of the arrow are the same.
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## This note was uploaded on 09/01/2011 for the course BUSINESS 101 taught by Professor Jones during the Spring '11 term at Southern Nazarene.

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Chapt 3 notes - CHAPTER 3 FORMULAS, EQUATIONS, AND MOLES...

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