# 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