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The Student and Tutor continued their study of electrochemistry, focusing on the relationships between cell potential, electrical work, Gibbs free energy, and the Nernst equation. They worked through several numerical problems, including calculating Gibbs free energy, determining cell potentials under non-standard conditions, and finding unknown concentrations. The session is scheduled to continue later in the evening to cover the remaining slides.

The Student and Tutor reviewed the fundamental concepts of Fisher projections, including their rules and the stepwise method for converting stereoformulas into Fisher projections, using lactic acid as a detailed example. They discussed the significance of bond orientation (vertical vs. horizontal) and acceptable rotations. For future sessions, the Tutor plans to conduct a test and review earlier concepts, requesting the Student provide relevant lecture materials from their professor.

The Tutor and Student reviewed various conformations of cyclohexane, including the boat, twisted-boat, and chair forms, discussing the factors contributing to their stability, such as angle, eclipsing, and steric strains. The Student took detailed notes on these concepts and began working on multiple-choice questions to solidify their understanding, with plans to continue the practice in a follow-up session.

The Student and Tutor engaged in an extensive session on acid-base equilibrium, working through several problems involving weak acids and bases. They practiced setting up ICE tables, applying the quadratic formula, and calculating pH, pOH, Ka, and Kb values. The session also covered percentage dissociation, identifying strong versus weak bases, and the principles of polyprotic acid dissociation. They outlined a plan to complete the remaining acid-base topics (salts) and begin studying enzymes in upcoming sessions.

Student and Tutor reviewed a chemistry exam, focusing on specific organic chemistry concepts where the Student lost points. Topics covered included conjugated pi systems, electrophilic aromatic substitution, Diels-Alder reactions (stereochemistry, s-cis/s-trans conformations, intramolecular reactions), and detailed reaction mechanism drawing with transition states. They plan to continue reviewing the remaining exam questions and practice more intramolecular Diels-Alder problems in their next session.

The Student and Tutor reviewed foundational concepts in general and organic chemistry, including Lewis structures, sigma and pi bonds, molecular hybridization, and resonance structures. They practiced determining molecular shapes and bond angles using a hybridization calculation formula and discussed the delocalization of pi electrons. The next session is planned to cover acids and bases.