Chapter 15 Lecture Problems


  1. For a 0.100 M CH3COOH at equilibrium, calculate Ka if at equlibrium [H3O] = 1.318*10-3 M:
  2. CH3COOH H2O <--> CH3COO- H3O+
    Initial (M) 0.100     0 0
    Change (M) -1.318*10-3     +1.318*10-3 +1.318*10-3
    Final (M) 0.0987     1.318*10-3 1.318*10-3

  3. For a nitrous acid (Ka = 4.5 x 10-4) solution find the pH and pOH for initial nitrous acid concentrations of
    1. 1.0 M
    2. 0.001 M
    3. 10-8 M.
    4. Solutions

  4. Acetic Acid Equlibrium
    1. Calculate the H3O+, OH-, acid concentration, base concentration, pH and pOH when 1.00 g of acetic acid is added to 250.0 mL of water.
    2. Solution

  5. Sodium Acetate Equlibrium
    1. Calculate the H3O+, OH-, acid concentration, base concentration, pH and pOH when 1.00 g of sodium acetate is added to 250.0 mL of water.
    2. Solution

  6. Ammonium Chloride Equlibrium
    1. Calculate the H3O+, OH-, acid concentration, base concentration, pH and pOH when 1.00 g of ammonium chloride is added to 250.0 mL of water.
    2. Solution

  7. Nitrous Acid Equlibrium
    1. Calculate the H3O+, OH-, acid concentration, base concentration, pH and pOH when 1.00 g of nitrous acid is added to 250.0 mL of water.
    2. Solution

  8. Sodium Nitrite Equlibrium
    1. Calculate the H3O+, OH-, acid concentration, base concentration, pH and pOH when 1.00 g of sodium nitrite is added to 250.0 mL of water.
    2. Solution

  9. Nitric Acid Equlibrium
    1. Calculate the H3O+, OH-, acid concentration, base concentration, pH and pOH when 1.00 g of nitric acid is added to 250.0 mL of water.
    2. Solution



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