Stoichiometry

Outline Stoichiometry Interpreting Equations Mole Ratio Limiting and Excess Reagent Theoretical and Actual Yield Percent Yield

Stoichiometry Calculation of quantities in chemical reactions How much (mass, volume, moles, etc.) we are working with? Think of it as the accounting of chemistry

Interpreting Equations Balanced equations can be interpreted in terms of: atoms, molecules, moles, mass, and volume. Atoms, molecules, and moles easy to work with Mass and volume are more difficult

Mole Ratio Conversion factor derived from coefficients of a balanced equation in terms of moles. For example: 2H2 + O2 -> 2H2O has a mole ratio of 2:1:2

Limiting and Excess Reagents Limiting: Reagent that determines the amount of product that can be formed Excess: Reagent that is not completely used up in a reaction Sandwiches

Theoretical and Actual Yield Theoretical: Maximum amount of product that could be formed from given amounts Actual: Amount of product that actually forms when carried out. Furnace

Percent Yield Ratio of the actual yield to the theoretical yield expressed as a percent. If I was supposed to get 10 grams and I only got 8 grams, my percent yield would be 80% Batting Average