Stoichiometry - Stoichiometry Introduction to Stoichiometry I Stoichiometry A Composition Stoichiometry deals with mass relationships of elements 1

Stoichiometry - Stoichiometry Introduction to Stoichiometry...

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Stoichiometry Introduction to Stoichiometry I. Stoichiometry A. Composition Stoichiometry - deals with mass relationships of elements 1. Multiply/ dividing by molar mass to get the mass or moles 2. ex. 2 moles of carbon = 24 grams B. Reaction Stoichiometry - involves mass relationships in a chemical equation 1. starts with a balanced chemical equation II. Reaction Stoichiometry A. grams of A moles of A moles of B grams of B B. Mole ratio - conversion factor; relates amounts in moles of two substances involved in a chemical reaction 1. ex. In the equation 2H 2 + O 2 2H 2 O a. 2 moles H 2 / 1 mole O 2 is an example of mole ratio
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Unformatted text preview: C. Molar Mass 1. Use conversion factors to go from moles mass and vice versa 2. ex. 10 grams carbon x (1 mol/ 12 grams) = 5/6 mol carbon 9-2: Ideal Stoichiometric Calculations I. Ideal conditions A. Occur when a reactant is completely turned into product B. Completely theoretical- only shows maximum amount of product C. 100% yield is rarely accomplished II. Conversion of quantities in moles A. Use a mole ratio (information can be looked up in the Periodic Table of elements) 1. ex. In the equation 2H 2 + O 2 2H 2 O a. 10 mol O 2 x (2 moles H 2 / 1 mole O 2 ) = 20 mol H 2...
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