InterAct Math

Welcome to InterAct Math for University Chemistry! We've selected exercises that will help you build the math skills you need to succeed in the most math-intensive chapters in University Chemistry, by Peter Siska. With so many exercises available, you can continue to come back and practice as often as you need to

Before you begin, go to the Install Wizard to check to make sure you have the appropriate plug-ins on your computer and to install them if you don't.

in University Chemistry by clicking on the chapter below. Or choose the specific skill within that chapter you'd like to work on by clicking one of the numbered sections below the chapter title. When you get to the InterAct Math site, you can further narrow your focus by choosing the objectives within each section from the pulldown menu.

Before you begin, make sure you have visited the Install Wizard to install the appropriate plug-ins onto your computer.

1.Physical Principles Underlying Chemisty

    1.1 Exploring the Order of Mathematical Operations

    1.2 Exponents and Scientific Notation

    1.3 Rounding Numbers in Calculations

    1.4 Fractions

    1.5 Using Percentages to Calculate Atomic Abundances

    1.6 Adding and Subtracting When Calculating Atomic and Mass Numbers

    1.7 Decimal Numbers in the Atomic Masses

    1.8 Working With Signed Numbers in the Atom

    1.9 Problem-Solving with Multiplication and Division

    1.10 English Units of Measure

    1.11 Metric Units of Measure

    1.12 Area and Volume

    1.13 Solving Problems Using Conversion Factors

2. The Quantum Revolution: The Failure of Everyday Notions to Apply to Atoms.

    2.1 Working with Numbers in Scientific Notation

    2.2 Working with the Signed Numbers When Balancing Nuclear Equations

    2.3 Conversion Factors in Nuclear Radiation Calculations

    2.4 Dividing Whole and Decimal Numbers When Calculating Half-Life

3. Wave Mechanics and the Hydrogen Atom: Quantum Numbers, Energy Levels, and Orbitals.

    3.1 Adding, Subtracting, Multiplying, and Dividing Calculating the Energy of a Phase Change

    3.2 Natural Logarithms

4. Atoms with Many Electrons and the Periodic Table.

    4.1 Manipulating Formulas to Find the Wavelength and Frequency of Radiation

    4.2 Metric Conversions of Wavelength

    4.3 Multiplying and Dividing Numbers in Scientific Notation

    4.4 Working with Signed Numbers When Calculating Effective Nuclear Charges

5. Valence Electron Configurations, Periodicity, and Chemical Behavior.

    5.1 Using Decimal Numbers in the Atomic Radii

    5.2 Metric Conversions of Atomic Radii

    5.3 Working with the Signed Numbers When Comparing Periodic Trends

    5.4 Adding and Subtracting When Electronegativity Differences and Ionization Energies

6. Orbitals and Chemical Bonding I: The Valence Bond Model and Molecular Geometry.

    6.1 Working with Signed Numbers in Formal Charge Calculations

    6.2 Adding, Subtracting, Multiplying, and Dividing When Calculation Lattice Energies

7. Orbitals and Chemical Bonding II: The Molecular Orbital Model and Molecular Energy Levels.

    7.1 Working with Signed Numbers in Chemical Formulas

8. Molecular Motion and Spectroscopy.

    8.1 The Order of Mathematical Operations When Calculating Heat Energy

    8.2 Manipulating Formulas to Calculate Gibbs Free Energy

    8.3 Working with the Signed Numbers Determining Spontaneity

    8.4 Temperature Conversions between Fahrenheit and Celsius

    8.5 Solving Natural Logarithms

9. Properties of Gases and the Kinetic Molecular Theory.

    9.1 Exploring the Order of Mathematical Operations in Rate Laws

    9.2 Using Percentages in Rate Law Calculations

    9.3 Manipulating Formulas to Solve for Concentration, Rate Constant, or Time

    9.4 Dividing Whole and Decimal Numbers When Calculating Half-Life

    9.5 Solving Natural Logarithms

    9.6 Using and Interpreting Graphs

10. Energy Changes in Chemical Reactions.

    10.1 Multiplying Whole Numbers to Balance Chemical Equations

    10.2 Adding and Multiplying Decimal Numbers to Find Molar Mass

    10.3 Ratios in Chemical Formulas

    10.4 Rounding in Chemical Calculations

    10.5 Using Scientific Notation in Stoichiometric Calculations

    10.6 Working with Signed Numbers in Oxidation-Reduction Equations

    10.7 Using Conversion Factors in Chemical Calculations

    10.8 Using Percentages in Stoichiometric Calculations

11. Spontaneity of Chemical Reactions

    11.1 The Order of Mathematical Operations When Calculating Heat Energy

    11.2 Manipulating Formulas to Calculate the Specific Heat of a Reaction

    11.3 Working with the Signed Numbers When Calculating Heat Energy

    11.4 Temperature Conversions between Fahrenheit and Celsius

    11.5 Subtracting Decimal Numbers When Calculating Temperature Changes

    11.6 Rounding Numbers in Calculations

    11.7 Adding and Multiplying Decimal Numbers to Calculate Standard Enthalpies

12. Free Energy and Chemical Equilibrium.

    12.1 Multiplying and Dividing Decimal Numbers to Find the Equilibrium Constant

    12.2 Working with Concentration Expressed in Scientific Notation

    12.3 Raising Concentrations to the Second and Third Power

    12.4 Manipulating Formulas to Solve for the Equilibrium Constant or Concentration

    12.5 Solving the Quadratic Equation to Find the Equilibrium Concentration

13. Electrochemistry.

    13.1 Working with the Signed Numbers When Balancing Oxidation-Reduction Equations

    13.2 Manipulating Formulas to Find the Potential of an Electrochemical Cell

    13.3 Natural Logarithms

    13.4 Powers and Roots Non-Standard Electrochemical Cell Calculations

14. States of Matter and Intermolecular Forces.

    14.1 Working with Whole Numbers in Chemical Formulas

    14.2 Working with Signed Numbers in Ionic Formula

    14.3 Ratios in Chemical and Empirical Formulas

15. Rates and Mechanisms of Chemical Reactions.

    15.1 Volume of a Unit Cell

    15.2 Fractions in Unit Cells

    15.3 Metric Conversions of Length

    15.4 Using Ratios to Find the Formula of a Binary Compound

16. The Nucleus.

    16.1 Metric Conversions of Mass

    16.2 Dividing Whole and Decimal Numbers to Calculate Concentration

    16.3 Using Percent Concentrations in Calculations

    16.4 Manipulating Formulas to Solve for Molarity, Boiling Point Elevation, or Freezing Point Depression

    16.5 Conversion Factors in Aqueous Solutions

17. The Transition Metals.

    17.1 Working with Concentrations Expressed in Scientific Notation

    17.2 Working with the Signed Numbers in Salt Formulas

    17.3 Powers and Roots in Ksp Calculations

    17.4 Calculating the Logarithm or Inverse Logarithm

    17.5 Manipulating Formulas When Calculating Solubility

    17.6 Metric Conversions of Volume

18. The Chemistry of Carbon.

    18.1 Working with Concentrations Expressed in Scientific Notation

    18.2 Working with the Signed Numbers in Acids and Bases

    18.3 Powers and Roots in pH and Buffer Calculations

    18.4 Calculating the Logarithm or Inverse Logarithm in pH

    18.5 Manipulating Formulas When Calculating pH or Equilibrium Concentrations

    18.6 Metric Conversions of Volume

    18.7 Conversion Factors in Titration Calculations