All Chapters Video 2.1 Acid-Base Definitions Chapter OutlineChapter Quiz Question? Ask Dr. Mike! Lesson Summary • A Lewis acid is a substance that accepts electrons. • A Lewis base is a substance that donates electrons. Lesson 2.1 Acid-Base Definitions 2.1 Acid-Base Definitions 2.1 Quiz Video Solution 2.2 Conjugate Base-Acid Relationship and pH Scale 2.2 Quiz Video Solution 2.3 Ranking Acids and Bases with CARDIO (Charge) 2.3 Quiz Video Solution 2.4 Ranking Acids and Bases with CARDIO (Atom) 2.4 Quiz Video Solution 2.5 Ranking Acids and Bases with CARDIO (Resonance) 2.5 Quiz Video Solution 2.6 Ranking Acids and Bases with CARDIO (Dipole Induction) 2.6 Quiz Video Solution 2.7 Ranking Acids and Bases with CARDIO (Orbitals) 2.7 Quiz Video Solution 2.8 Acid and Base Review 2.8 Quiz Video Solution Instructor Dr. Mike Christiansen Dr. Christiansen is a chemistry professor at Utah State University and has a PhD in organic chemistry. He's been teaching students chemistry for nearly 12 years.