Chapter 9: Aqueous Solutions & Chemical Equilibria CHE 321: Quantitative Chemical Analysis Dr. Jerome Williams, Ph.D. Saint Leo University

Overview Electrolytes, Acids & Bases Chemical Equilibrium Buffer Solutions

Electrolytes, Acids & Bases Review Concepts from general & organic chemistry. – Electrolytes (Definition, Classification) – Acids & Bases (Three Systems to Define) – Conjugate Acid/Base Pairs (Bronsted-Lowry) – Amphiprotic Species & Amphiprotic Solvent – Zwitterion – Autoionization (Autoprotolysis) – Acid/Base Strength

Table 9-1 p198

Figure 9-1 p199

Figure 9-1a p199

p200

Figure 9-2 p201

p203

Chemical Equilibrium Review Concepts from general & organic chemistry. – Chemical Equilibrium – Law of Mass Action – LeChatlier’s Principle – Equilibrium Constant Expressions (K a,K b,K w,K sp ) – Common Ion Effect – Differentiating Solvent – Leveling Solvent

Table 9-2 p204

Table 9-3 p206

Table 9-4 p214

Buffer Solutions Review Concepts from general & organic chemistry. – Buffer Solutions – Henderson-Hasselbach Equation – Buffer Capacity

p220

Figure 9-4 p223

Figure 9-5 p225

Figure 9-6 p226

Suggested Problems HW Set 7: 9.1, 9.4, 9.6, 9.7, 9.8 HW Set 8: 9.10, 9.13, 9.17, 9.20, 9.25, 9.27