Unit 5 - Chemical Composition

                      and its Changes
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Section 5.1 Chemical Formulas

Objectives

  1. Demonstrate competency in writing chemical formulas using oxidation numbers.
  2. Demonstrate proficiency in naming chemical compounds.
  3. Explain the difference between an empirical and a molecular formula.
  4. Define a mole and calculate molar mass.
  5. Use the molar mass to calculate the molarity of solutions, percentage composition, and empirical and molecular formulas.
  6. Name and write formulas for simple organic compounds.

Activities

  • Discussion:
  1. Use of symbols and formulas.
  2. Oxidation numbers.
  3. Formula base problems.
  • Laboratory:
  1. Chemical formulas and equations
  2. Naming compounds.
  3. Formula of a hydrate.
  4. Percentage composition.
  • Computer Lab: (HS)
  1. Empirical and molecular formulas.
  2. Moles
  3. Molarity
  4. Percentage composition
  • Worksheet: Study guide
  • Projects:
  1. Common names
  2. Element
  • Textbook Questions
  • Vocabulary
  • Video:  Formulas
  • Demonstrations

STANDARDS
UCP 1, 3; A 1; B 2-3; E 1-2; F 5-6; G 1-3

Section 5.2   Chemical bonding

Objectives

  1. Identify the type of bonding between two elements given their electronegativities.
  2. Differentiate among properties of ionic, covalent, and metallic bonds.
  3. Use models to explain the structure of a given organic or inorganic molecule.
  4. Distinguish between polar and nonpolar covalent bonds.

Activities

  • Discussion:  Chemical bonds.
  • Laboratory:  Molecular models
  • Worksheet:  Study guide
  • Project:  Build a molecule.
  • Demonstrations
  • Textbook Questions
  • Vocabulary
  • Video:  Bonding

STANDARDS
UCP 2; A 1-2; B 1-3; E 2; G 1-2

Section 5.3  Chemical Equation

Objectives


  1. Write chemical equations for any type of reaction.
  2. Use coefficients to balance chemical equations.
  3. Distinguish between 4 types of reactions:
  • Composition
  • Decomposition
  • Single displacement
  • Double displacement.
4.     Solve stoichiometry, percentage yield, and heat of reaction problems.
5.     Identify and explain the factors that affect reaction rates.

Activities
  • Discussion:  Chemical equation and quantitative relationships.
  • Laboratory:
  1. Stoichiometry.
  2. Reaction rates.
  3. Reaction types
  • Computer Lab: (HS) Stoichiometry
  • Worksheet:  Study guide
  • Textbook Questions
  • Vocabulary
  • Video:  Reactions Demonstrations

STANDARDS
UCP 2;  B 2, 3, 6; E 1-2; G 1-2


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