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| Goal
I. Use a balanced chemical equation to derive mass relationships among
reaction components. |
Preparation: Review and expand
the skills of balancing chemical equations (pp. 104-109).
Objectives: To meet the requirements of Goal
I, you must be able to:
- state the
Law of Conservation of Matter as it applies to
chemical reactions;
-
use mole
ratios derived from a balanced chemical equation to calculate
quantitative relationships among the components of the reaction;
-
explain
limiting reagent and excess reagent as these terms apply to reactants in
a chemical reaction;
- identify
limiting reagent and calculate the excess
reagent (in moles or grams) in a balanced
chemical reaction, given the quantities
of two or more reactants (in moles or
grams);
- calculate
the theoretical and percent
yield, given quantities of one or
more of the reactants.[Top]
| Goal II. Relate the chemical
formula for a compound to its composition by mass. |
Objectives: To meet the requirements of Goal
II, you must be able to:
- distinguish
between the empirical formula
and the molecular formula for a molecular
compound;
- calculate
calculate the empirical formula for a
compound given its percent by mass composition;
- calculate
the mass percent composition of a compound
from its empirical or molecular formula;
- use
the empirical formula together with the
formula mass for a compound to derive
its molecular formula.[Top]
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Unit 3 Assignments
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| Read: |
Text
Chapter 3, pp. 90-129 |
| Video
Programs: |
- Balancing
Chemical Equations
- Stoichiometry
I
- Stoichiometry
III
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| Textbook
Assignments: |
Read
and Understand all "Sample Problems," "Follow
Up Problems" and select any 5 blue-colored problems at the
end of the chapters.
The
answers for the Follow Up Problems are at the end
of the chapter; the answers for the blue-colored
problems are in Appredix E.
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| Mandatory ChemSkill Builder Assignments to be submitted for grade (Scores of 80% or higher on each assigned HW section will receive full credit. ) |
Mandatory
assignments to be submitted for grade
Chapter
4.2, 4.3, 4.4, 4.5, 4.6 Limiting Reagent, % Composition,
Empirical Formula,
Chapter
5.4 Balancing Equations
Chapter
6.1, 6.4 Molar Concentration and Molarity of Ions
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| Lab Assignments: |
- Do Cyber Lab
3 on three separate unknowns. (See
CHM 111 Laboratory Guide and Cyber-Chem CD Disk #1.)
- Submit the report in Blackboard Assignments area
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