Reaction stoichiometry is used daily by professionals in research and industries.  Students will use knowledge of chemical reactions and the law of conservation of mass to analyze various types of problems.  Dimensional Analysis, the main method used in stoichiometry, is an extremely powerful way of solving math and science problems.  It can be used to learn how to strategically use units and numerical data, recognize patterns, and construct viable arguments and critique the reasoning of others.

HS-PS1-7. Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during

a chemical reaction. [Clarification Statement: Emphasis is on using mathematical ideas to communicate the proportional relationships between

masses of atoms in the reactants and the products, and the translation of these relationships to the macroscopic scale using the mole as the conversion from the

atomic to the macroscopic scale. Emphasis is on assessing students’ use of mathematical thinking and not on memorization and rote application of problemsolving

techniques.] [Assessment Boundary: Assessment does not include complex chemical reactions

1. That you begin to see some real world applications of chemistry in manufacturing industries!
2. That you can “mole road” to make a variety of chemical conversions using:
a. Molar Mass
b. Molar Volume
c. Density
d. Avogadro’s Number
3. That you can apply these concepts to the following common real-life situations: When the reaction is not perfect – it is incomplete, there are losses due to other reactions, or losses due to the steps in the process. In this case, the YIELD is not 100%.
4. In the real world we often have to deal with VERY EXPENSIVE reactants. We want to make sure we maximize the reaction to use every bit of the expensive stuff. The expensive stuff will be the LIMITING REACTANT and the other reactant(s) will be in excess – there will be some left over at the end.
5. Above all, we want to continue to help you develop the critical thinking skills necessary to be successful in college and life!

Molar Mass

Molar Volume

Density

Avogadro's Number

Stoichiometry

Dimensional Analysis

Limiting Reactant

Excess Reactant

Percent Yield

Percent Error

Ionic Compound

Covalent Molecule

Actual/ Theoretical Yield

Experimental Yield

Mole Ratio/ "mole bridge"

Mole

Coefficient

Subscript

Atomic Mass Unit

Formula Unit

Law of Conservation of Mass

Notes have video links embedded.

Graphic Organizer

Reciprocal Teaching -- Student lead problem solving

Smore's Lab

Limiting Reactant Lab

Graphic Organizer

Formative Assessments

Exit Slips