CHM 2046C Sample Module 12 Name: ____Answers____

Part D Acid-Base/pH Titrations Curves 10 points

How do titration curves differ for strong acid-strong base, strong acid-weak base; weak acid-strong base, and weak acid-weak base titrations? Sketch curves for each and describe their pH equivalence points.

(a) Strong Acid-Strong Base titrations

(b) Strong Acid-Weak Base titrations

(c) Weak Acid-Strong Base titrations:

(d) Weak Acid-Weak Base titrations

(3) Titrations against polyprotic acids can be divided into separate titrations for each hydrogen ion removed. Explain and demonstrate with a titration curve.

(4) What are acid-base indicators. Choose appropriate indicators for the four titrations listed in question #1.