General Chemistry: Course Schedule and Key Topics Overview

Course Schedule Overview

Introduction

This document outlines the schedule and major topics for CHE 131: General Chemistry B, including exam dates, review sessions, and key lecture subjects. The schedule provides a roadmap for students to prepare for exams and workshops, and highlights the progression of core chemistry concepts throughout the semester.

Key Topics Covered

Covalent Bonding Model

The covalent bonding model describes how atoms share electrons to form molecules. This model is fundamental to understanding molecular structure and chemical reactivity.

• Covalent Bond: A chemical bond formed by the sharing of one or more pairs of electrons between atoms.

• Bond Energies: The energy required to break a bond between two atoms in a molecule. Higher bond energy indicates a stronger bond.

• Example: In a water molecule (H2O), each hydrogen atom shares an electron with the oxygen atom, forming covalent bonds.

Formal Charge

Formal charge is a bookkeeping tool used to determine the distribution of electrons in molecules and ions. It helps predict the most stable Lewis structure for a molecule.

• Definition: The formal charge of an atom is calculated as: $\text{Formal Charge} = \text{Valence Electrons} - (\text{Nonbonding Electrons} + \frac{1}{2} \times \text{Bonding Electrons})$

• Application: Structures with formal charges closest to zero are generally more stable.

• Example: In the nitrate ion (NO3-), formal charge calculations help determine the best resonance structure.

Conservation of Mass and Energy

The law of conservation of mass and energy states that mass and energy cannot be created or destroyed in a chemical reaction, only transformed.

• Conservation of Mass: The total mass of reactants equals the total mass of products in a chemical reaction.

• Conservation of Energy: Energy changes form (e.g., heat, light) but the total energy remains constant.

• Equation: $\text{Total Mass}_{\text{reactants}} = \text{Total Mass}_{\text{products}}$

• Example: In combustion reactions, the mass of the fuel and oxygen equals the mass of the products (CO2 and H2O).

Course Structure and Assessment

Exams and Reviews

• Exam 2: Scheduled after coverage of covalent bonding and formal charge topics.

• Exam 3: Scheduled after conservation of mass and energy topics.

• Cumulative Final Exam: Covers all topics discussed throughout the semester.

• Review Sessions: Held before each exam to reinforce key concepts and problem-solving strategies.

Workshops

• Purpose: Workshops provide opportunities for collaborative learning and application of lecture material.

• Topics: Workshops are aligned with major lecture topics and exam preparation.

Additional Info

• Some schedule entries are abbreviated or unclear; inferred topics are based on standard General Chemistry curriculum and context.

• Students are encouraged to use this schedule to plan study sessions and seek help during review and workshop periods.