Chapter 9: Aqueous Solutions & Chemical Equilibria

CHE 321: Quantitative Chemical AnalysisDr. 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 (Ka,Kb,Kw,Ksp)

– 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