Chapter Objectives
Chapter 3 - Stoichiometry
Sections 3.1-3.5

Be able to discuss the meaning and usefulness of the mole in chemistry.
- Assigned problem: 3.5
Be able to describe the difference between the formula mass (ionic compounds), or molecular mass (covalent compounds), and the molar mass.
- Assigned problems: 3.1, 3.2, 3.3, 3.4
Be able to describe the relationship between the amount of a substance (moles), the mass of a substance (grams).
- Assigned problem: 3.7
Be able to describe the information contained in a chemical formula
- Assigned problem: 3.6

Be able to convert between the amount of a substance (moles), the mass of a substance (grams).
- Assigned problems: 3.12, 3.15, 3.16, 3.23, 3.26
- Sample problems: 3.1, 3.2, 3.3
Be able to use mass percent to find the mass of an element in a given mass of a compound.
- Assigned problems: 3.18, 3.20
- Sample problem: 3.4a, 3.4b

Be able to describe the procedures used to find the empirical and molecular formulas of a compound.
- Assigned problems: 3.30, 3.31, 3.32
Be able to discuss how more than one substance can have the same empirical form and the same molecular formula (isomer).

Be able to determine the empirical and molecular formulas of a compound from mass percent and molar mass of elements.
- Assigned problems: 3.33, 3.35, 3.37, 3.43, 3.44
- Sample problems: 3.5, 3.6
Be able to determine a molecular formula from combustion analysis.
- Assigned problem: 3.46, 3.138
- Sample problem 3.7a, 3.7b

Be able to describe the importance of balancing equations fro the quantitative study of chemical reactions.
- Assigned problems: 3.47, 3.48, 3.49

Be able to convert a chemical statement or a molecular depiction into a balanced equation

Be able to describe the mole-mass-number information contained in a balanced equation.
- Assigned problems: 3.47, 3.58
Be able to discuss the relation between amounts of reactants and products.
- Assigned problems: 3.48, 3.49, 3.50, 3.60
Be able to discuss why one reactant limits the yield of a product.
- Assigned problems: 3.59
Be able to describe what causes a lower-than-expected yields and the distinction between theoretical and actual yields
- Assigned problems: 3.159

Be able to use stoichiometrically equivalent molar rations to calculate amounts of reactants and products in reaction of pure and dissolved substances.
- Assigned problems: 3.61, 3.63, 3.65, 3.66, 3.68, 3.70, 3.72
- Sample problem: 3.10a, 3.10b, 3.19
Be able to write an overall equation from a series of equations
- Assigned problem: 3.81
- Sample problem: 3.11
Be able to solve limiting-reactant problems from molecular depictions and for reactions of pure and dissolved substances.
- Assigned problems: 3.74, 3.76, 3.80, 3.88, 3.90
- Sample problems: 3.12a, 3.12b, 3.13a, 3.13b, 3.20a, 3.20b
Be able to calculate percent yield
- Assigned problem: 3.86, 3.156
- Sample problem 3.14

Be able to describe the meanings of concentration and molarity
- Assigned problems: 3.92
Be able to discuss the effect of dilution on the concentration of solute.
- Assigned problem 3.95
Be able to describe how reactions in solution differ from those of pure reactants
- Assigned problems: 3.104, 3.106

Be able to calculate molarity and mass of solute in solution.
- Assigned problems: 3.96, 3.98, 3.100, 3.108
- Sample problems: 3.15, 3.16
Be able to calculate how to prepare a dilute solution from a concentrated one.
- Assigned problems: 3.93, 3.101
  - Sample problem: 3.17
Be able to use molecular depictions to illustrate changes in volume.
- Assigned problems: 3.94, 3.130
- Sample problem 3.18