LEARN NC

K–12 teaching and learning · from the UNC School of Education

Goal 4

The learner will develop an understanding of chemical reactions.

Objective 4.01
Analyze the various types of common chemical reactions
  • Acid-base reactions; concepts of Arrhenius, Brönsted-Lowry, and Lewis;
  • Coordination complexes; amphoterism.
  • Precipitation reactions.
  • Oxidation-reduction reactions.
    • Oxidation number.
    • The role of the electron in oxidation-reduction.
    • Electrochemistry: electrolytic and galvanic cells; Faraday's laws; standard half-cell potentials; Nernst equation; prediction of the direction of redox reactions.
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Objective 4.02
Apply the principles of stoichiometry
  • Ionic and molecular species present in chemical systems: net ionic equations.
  • Balancing of equations including those for redox reactions.
  • Mass and volume relations with emphasis on the mole concept, including empirical formulas and limiting reactants.
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Objective 4.03
Analyze systems in dynamic equilibrium
  • Concept of dynamic equilibrium, both physical and chemical; Le Chatelier's principle; equilibrium constants.
  • Quantitative treatment for gaseous reactions using Kp and Kc.
  • Quantitative treatment for reactions in solution Kc.
  • Quantitative treatment of for acids and bases; using Ka and Kb, pKa and pKb and pH.
  • Quantitative treatment for precipitation reactions and the dissolution of slightly soluble compounds using the solubility product constant, Ksp.
  • Common ion effect; buffers; hydrolysis.
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Objective 4.04
Analyze chemical kinetics
  • Concept of rate of reaction.
  • Use of differential rate laws to determine order of reaction and rate constant from experimental data.
  • Effect of temperature change on rates.
  • Energy of activation; the role of catalysts.
  • The relationship between the rate-determining step and a mechanism.
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Objective 4.05
Analyze chemical thermodynamics
  • State functions.
  • First law: change in enthalpy; heat of formation; heat of reaction; Hess's law; heats of vaporization and fusion; calorimetry.
  • Second law: entropy; free energy of formation; free energy of reaction; dependence of change in free energy on enthalpy and entropy changes.
  • Relationship of change in free energy to equilibrium constants and electrode potentials.
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