Chapter 10 Notes - Chapter10QuantityRelationshipsinChemical...

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Chapter 10 --Quantity Relationships in Chemical Reactions I. Stoichiometry: Using the balanced chemical equation to calculate the quantities of reactants/ products/ energy involved in chemical change. II. Mole relations in a chemical equation. Example: When 3.75 moles of octane (C_8H_18) burn completely in air, how many moles of CO_2 are produced? 1) Write a balanced chemical equation. C_8H_18 + O_2 ----> 8 CO_2 + 9 H_2O 16 O + 9 O =25. ..if odd # must go back and double everything 2 C_8H_18 + 25 O_2 ----> 16 CO_2 + 18 H_2O 32 O + 18 O= 50 O 2) Write what is given and wanted: Given: 3.75 mol C_8H_18 Wanted: ? mol CO_2 (3.75 mol C_8H_18) (16 mol CO_2) ( 2 mol
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C_8H_18) = 30.0 mol CO_2 IV. Yield A. Theoretical Yield 1. Def: maximum amount of product from given amounts of reactants 2. Calculate using stoichiometry B. Actual Yield 1. Def. Actual amount of product produced in the lab. 2. Often is less than theoretical yield. a. Some Product lost
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Chapter 10 Notes - Chapter10QuantityRelationshipsinChemical...

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