CHEM

• Stoichiometry


  Involves the mass relationships between reactants and products in a chemical reaction
• Stoichiometry


  All reaction stoichiometry relationships start with a balanced chemical equation
• Stoichiometry


  Equation gives the relative numbers of moles of reactants and products
• Stoichiometry


  Solve problems using RATIOS from the balanced equation
• Mole Ratio


  Ratios produced from the balanced equation
• Reaction Stoichiometry Problems Type 1

  Given and unknown quantities are amounts in moles
• Reaction Stoichiometry Problems Type 2

  Given quantity is amount in moles and unknown quantity is amount in grams
• Reaction Stoichiometry Problems Type 3

  Given quantity is in grams, and unknown quantity is amount in moles
• Reaction Stoichiometry Problems Type 4


  Given and unknown quantities are amounts in grams
• Limiting Reagent


  Reactant which will LIMIT the amount of product produced
• Limiting Reagent


  Need to calculate amount of product for BOTH given reactants to determine which limits the reaction
• Limiting Reagent


  The reagent left over is called the excess reactant
• Theoretical Yield


  Amount of product made under IDEAL conditions
• Theoretical Yield


  The most possible product you can make
• Theoretical Yield


  This is the number you calculate using stoichiometry
• Actual Yield


  Amount of product made during the actual reaction in the laboratory
• Percent Yield


  Ratio of actual yield/theoretical yield
• Percent Yield


  Tells you how good your reaction really was
• % yield = Actual yield / Theoretical Yield x 100