Chemistry Balancing Chemical Equations

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1.69 MB   |   52 pages

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Balancing Chemical Equations Guided Inquiry Lesson

Texas Chemistry Standards (TEKS)
C.8.D: The student is expected to use the Law of Conservation of Mass to write and balance chemical equations.
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Lesson Summary:
This guided inquiry lesson enables students to construct their own understanding of how to count atoms and balance chemical equations. Students are able to actively learn the material without lecture or note taking.

Part 1: Counting Atoms
Note: This section of the lesson contains components from the free lesson Introduction to Formulas.

• Students use illustrations of chemical compounds to determine the function of subscripts in chemical formulas.

• Students compare formulas with and without coefficients. They use this information to determine the how the presence of a coefficient affects the number of each type of atom in a compound.

Part 2: Balanced and Unbalanced Equations
• Students compare illustrations of unbalanced and balanced reactions. They are asked to count the number of each type of atom unbalanced and balanced reactions. Using this information, they determine the main difference between unbalanced and balanced reactions.

• Students infer that having the same number of atoms on both sides of the equation will result in the mass of the reactants being equal to the mass of the products. The Law of Conservation of Mass is introduced.

• Students return to the illustrations of unbalanced and balanced reactions in order to determine the function of coefficients in chemical equations.

• Students identify equations as balanced or unbalanced based on the number of each type of atom.

Part 3: Balancing Chemical Equations
• Students practice balancing chemical equations that require the addition of one coefficient.

• Students practice balancing chemical equations that require the addition of two coefficients.

• Students practice balancing chemical equations that require the addition of three coefficients.

• Students practice balancing chemical equations and check their answers by assembling a “triangle puzzle”.

Practice
Students practice balancing chemical equations by working through a set of task cards.

Student Study Sheet
Students are provided with a student study sheet summarizing all of the important concepts and vocabulary in this lesson.

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Learning Objectives (Bloom’s Revised Taxonomy):
Remembering: Define the following terms: chemical bond, subscript, reactant, product, balanced reaction, unbalanced reaction, Law of Conservation of Mass, coefficient.
Understanding: Explain how subscripts and coefficients are used in chemical formulas and reactions.
Applying: Use subscripts and coefficients to determine the number of each atom present in a compound.
Analyzing: Distinguish between balanced and unbalanced chemical equations.
Evaluating: Use coefficients to balance chemical equations.

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Included in this Download:
• Cover page (1 page)
• Guided inquiry lesson (16 pages)
• Handouts (3 pages)
• Student study sheets (2 pages)
• Teacher notes (2 pages)
• Guided inquiry lesson with suggested answers (15 pages)
• Task Cards (12 pages)
• Task Card Answers (1 page)

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Kendo's Chemistry Store
Total Pages
52
Answer Key
Included
Teaching Duration
1 hour

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Chemistry Balancing Chemical Equations
Chemistry Balancing Chemical Equations
Chemistry Balancing Chemical Equations
Chemistry Balancing Chemical Equations