Chem 128 Practice Problems Main Menu

  1. Chapter 10
    1. Mass Percent
    2. Molarity
    3. Molality
    4. Molality to Molarity
    5. Molarity to Molality
    6. Molecular Mass from Freezing Point Depression
    7. Freezing Point Depression
    8. Boiling Point Elevation
    9. Vapor Pressure Lowering
  2. Chapter 11
    1. Approximate Rate of Loss
    2. Half-Life of Second Order Reaction
    3. Concentration of First Order Reaction in Time
    4. Temperature Dependence of Rate
    5. Order from Initial Rates
    6. First Order Amounts as Time Proceeds
  3. Chapter 12
    1. Equilibrium Constant (Kp ) from Pressures
    2. Equilibrium Constant (Kp ) from Pressures
    3. Equilibrium Constant (Kc ) from Concentrations
    4. Concentrations from Kc
    5. A (g) B (g) Equilibrium
    6. CO(g) + H2O (g) CO2 (g) + H2(g) Equilibrium (I)([H2]equil = ?)
    7. CO(g) + H2O (g) CO2 (g) + H2(g) Equilibrium (II) (Pressure=?)
    8. PC5(g) PC3 (g) + C2(g) Equilibrium (III) (mole fraction=?)
    9. CO(g) + H2O (g) CO2 (g) + H2(g) Equilibrium (IV) (LeChatelier)
    10. CO(g) + H2O (g) CO2 (g) + H2(g) Equilibrium (V)([H2]equil = ?) Non-equal moles to start
    11. Special 2020 Example 1 (constructed response)
      1. Special 2020 Example 1 (source code)
      2. CAT.pm (source code)
      3. CGRutils 1 (source code)
      This is the Perl source code for the constructed response question.
    12. Special 2020 Example 1a (pull down menus
    13. Special 2020 Example 2 (spreadsheet equivalent)

  4. Chapter 13
    1. pH for strong acid
    2. pH for weak acid
    3. pH for strong base
    4. pH for weak base
    5. Ka by half neutralization
    6. Ka by one third neutralization
  5. Chapter 14
    1. Carbonic Acid
    2. Ammonium Chloride
    3. Calcium Acetate
    4. Acetic Acid Buffer
  6. Chapter 16
    1. Solubility of Silver Chromate
    2. Chromium (III) Iodate Ksp
    3. Does a precipitate form if one mixes two solutions?
    4. Solubility of Silver Chloride in Ammonia
    5. pH to Precipitate Chromium Hydroxidenew
    6. Selective Precipitationnew
    7. Multiple Precipitatesnew & difficult
  7. Chapter 17
    1. Entropy Change of a Reaction
    2. Free Energy Change of a Reaction
    3. Temperature Where Spontaneous/Non-Spontaneous Occurs
    4. Ksp from Thermodynamic Data
  8. Chapter 18
    1. Voltage of Ag/Cd cell
    2. Free Energy of Zn/Ag cell
    3. Voltage from Free Energy
    4. Nernst Equation
    5. Electrolysis