A 1 liter solution contains 0.288 M nitrous acid and 0.384 M potassium nitrite. Addition of 0.317 moles of sodium hydroxide will: (Assume that the volume does not change upon the addition of sodium hydroxide.) Raise the pH slightly Lower the pH slightly Raise the pH by several units Lower the pH by several units Not change the pH Exceed the buffer capacity

A 1 liter solution contains 0.554 M hypochlorous acid and 0.416 M potassium hypochlorite. Addition of 0.457 moles of perchloric acid will: (Assume that the volume does not change upon the addition of perchloric acid.) Raise the pH slightly Lower the pH slightly Raise the pH by several units Lower the pH by several units Not change the pH Exceed the buffer capacity

A 1 liter solution contains 0.479 M acetic acid and 0.359 M potassium acetate. Addition of 0.180 moles of hydroiodic acid will: (Assume that the volume does not change upon the addition of hydroiodic acid.) Raise the pH slightly Lower the pH slightly Raise the pH by several units Lower the pH by several units Not change the pH Exceed the buffer capacity