Chem 121 1st Edition Lecture 18 Outline of Last Lecture I. Physical vs. Chemical PropertiesII. Balancing Chemical EquationsIII. Molar MassIV. Stoichiometric CalculationsOutline of Current LectureI. Problem Solving Strategy (Stoichiometry)II. Concept of Limiting Reactant (Reagent)Current Lecture- Problem Solving Strategy (Steps):1. Organize known information and list what the question is desiring or asking for (unit/entity)2. Write a CORRECT formula/ a BALANCED equation3. Stoichiometry of different substances (entities) in moles in equation form4. Collect conversion factors (any property with two units/entities in division)5. Setting up solution map (Key: Use mole to connect different substances)6. Calculation- Limiting Reactant (Limiting Reagent, L.R.): The reactant limits the amount of product in achemical reaction- The reactant that runs out firsto Makes the least amount of product by conversiono Decides the amount of product produced- Theoretical Yield (T.Y.): The amount of product that can be made in a chemical reaction based on the amount of limiting reactanto Absolute 100% conversion of limiting reactant to producto Cannot be attained, only can be approached- Actual Yield (A.Y.): The amount of product actually produced by a chemical reactiono Units: mass (i.e. grams) or amount (mole)- Percent Yield (% Yield): Percentage of the theoretical yield that was actually attained in a chemical reactionThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Has no unito % Yield = Actual yield ÷ Theoretical yield ×
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