1. The concentration of a 10mL Ca(OH)₂ was determined with an endpoint volume of titration of 33mL of 0.15 M HCl. What is the concentration of the Ca(OH)₂?

a. 0.15 M

b. 0.25 M

c. 0.05 M

d. 1.0 M

2. Calculate the ph of a 30mL of 0.25m acetic acid after the addition of 15mL of 0.15M NaOH.;

a. 4.39

b. 4.47

c. 2.85

d. 2.68

3. What volume of 0.25m HCl is needed to reach the equivalent point titration for 25mL of 0.15m ammonia (Kb = 1.8x10^-5).

a. 15 mL

b. 25 mL

c. 13.75 mL

d. 0.25 mL