SLO 2.2 - Chemical Reactions

Key Concepts and Skills

• Write/Balance Chemical Equations: Describe a chemical reaction by writing chemical equation including phase subscripts and balanced coefficients. Identify the reactants and products in a written chemical equation.
• Molar Mass: Determine the mass of a compound in grams using atomic masses and chemical formulas.
• Reaction Stoichiometry (Mole-to-Mole Conversions): Determine mole ratios from balanced chemical equations and use this information to convert between moles of different substances.
• Reaction Atom-to-Mass-to-Mole Conversions: Perform the following conversions: atoms \(\leftrightarrow\) moles, grams \(\leftrightarrow\) moles, grams \(\leftrightarrow\) atoms using a balanced chemical reaction, molar mass, and Avogadro’s number.
• Limiting Reactant: Determine which reactant will be consumed first in a chemical reaction using a balanced chemical equation and initial amounts of reactants. Calculate (in mass or grams) the final amounts of all reactants and products.
• Percent Yield: Calculate the percent yield in a chemical reaction given the actual yield and initial amounts.

Reading

• From the textbook:
  • 4.1 Climate Change and the Combustion of Fossil Fuels
  • 4.2 Writing and Balancing Chemical Equations
  • 4.3 Reaction Stoichiometry
  • 4.4 Stoichiometric Relationships: Limiting Reactant, Theoretical Yield, Percent Yield, and Reactant in Excess
  • 4.5 Three Examples of Chemical Reactions: Combustion, Alkali Metals, and Halogens
• POGIL Activities
  • CA-26: How Many is a Mole?
  • CA-27: What Information Does a Chemical Equation Provide?
  • CA-28: How Much Can You Make?
• Other:
  • Chapter 6: More on Chemical Compounds (from An Introduction to Chemistry)
  • Naming Chemical Substances
  • Formulas and Nomenclature
  • Ionic Nomenclature
  • Chemical Nomenclature
  • Classification of Matter

Important Terms

Sample Assessment Questions

Dr. Thompson Videos

• Limiting Reagent Example - Moles and Grams

• Mole Concept

External Videos, Tutorials, Simulations

• Khan Academy - Stoichiometry
• Khan Academy - Limiting Reactants
• More Examples of Limiting Reactants
• PhET - Balancing Chemical Equations
• Chemical Equation Basics

Practice Problems

• From the textbook:
  • 4.23-27, 4.32-33, 4.36-37, 3.44-46, 3.49, 3.52, 3.59, 3.64, 3.71
• From other external sources:
  • Mass & Mole Calculations with Reactions
  • Balancing Equations
  • Balancing Equations
• From Dr. Thompson (links and embedded versions below):
  • The Mole Concept
  • Limiting Reagent
  • Limiting Reagent and Percent Yield

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