General Chemistry

 

General Chemistry II

 

Welcome to the video archive for Chem 230, General Chemistry II. The preclass videos are short introductions to the topic of the day and introduce some terminology and simple concepts that are further developed in class. The post class videos are more in depth and usually cover a concept or type of problem that students find difficult. They are not meant to be a comprehensive review of all of the material covered in class.

 

Kinetics

 

Preclass intro video

Postclass video
     
Reaction Rates NA Rate expressions and the triple decker sandwich analogy
Rate Laws Demo of how concentration effects rate Problem solving: the method of initial rates
Time dependence Predicting the future using integrated rate laws Problem solving: using integrated rate laws and half life
Energy Diagrams and Temperature dependence The reaction coordinate diagram Collision theory and Arrhenius equation problem solving

Reaction mechanisms and catalysis

 What is a chemical mechanism? Mommy, where do mechanisms come from?

 

 Thermodynamics

 

Preclass intro video

Postclass video
Introduction and entropy Introduction to entropy Factors that affect entropy: predicting spontaneity
Gibb’s free energy and spontaneity Introduction to Gibb's free energy The second law and ∆G=∆H-TS
Using tabulated values Standard conditions and calculating ∆H for a reaction Using tabulated thermodynamic values in calculations

 

Equilibrium

 

Preclass intro video

Postclass video
Intro to equilibrium Some reactions don't go all the way, an introduction to equilibrium Kc and Kp, What's up with that?
Calculating equilibrium constrants and reaction quotients Calculating K's: Our first ICE table Calculating K's: Using ICE tables
Equilibrium and thermodynamics ∆G at non-standard concentrations How are equilibrium and thermodynamics related?
Le Chatelier's Principle Intro to Lechatelier's Principle Mini-lecture on Lechatelier's Principle

 

Acid-base equilibrium

 

Preclass intro video

Postclass video
Intro to acids and bases Basics of acids (and bases) Intro to acids and bases
Strong and weak acids and bases Strong and weak acids and bases Solving weak acid dissociation problems
Acid-base calculations Starting acid/base problems Calculating pH of a salt solution
Salt solutions and intro to buffers Calculating pH of a salt solution  
Acid-base titrations   Calculating pH at the equivalence point

 

Electrochemistry

 

Preclass intro video

Postclass video
Oxidation numbers and redox reactions   Balancing a redox reaction in basic solution
Electrochemical cells and cell potentials Have you seen my Red Cat? A summary of electrochemical cells
Cell potential, equilibrium and free energy E° must be related to ∆G and K, right?  
The Nernst Equation   Problem solving using the Nernst equation
Electrolysis, Solar energy and batteries Tyler, where do batteries come from? Solving electrolysis problems