About & Angel Club
Information for lesson
"Chemistry Khan Academy"
Description: Videos on chemistry (roughly covering a first-year high school or college course). Chemistry is the science of matter, especially its properties, structure, composition, behavior, reactions, interactions and the changes it undergoes. Chemistry is sometimes called "the central science" because it connects physics with other natural sciences such as astronomy, geology and biology.
Resources: OpenCourseware from Khan Academy, MIT, UC Berkeley, Stanford along with many of the World's finest University's.
Other information: http://goo.gl/gE02Ht
Professors: Ebenezer Appiah, Joshua Coleman, Default Professor, Michael Williams, Ankush Dharkar
Introduction to the atom : The atom, proton, neutron and electron
More on orbitals and electron configuration : More intuition on orbitals. Touching on electron configu
Electron Configurations : Introduction to using the periodic table to determine electron configurations
Electron Configurations 2 : Figuring out configurations for the d-block elements
Valence Electrons : Looking at valence electrons to figure out reactivity
Groups of the Periodic Table : Properties of alkali, alkaline earth and transition metals. Halogens and noble
Periodic Table Trends: Ionization Energy : What an ion is. Using the periodic table to understand how diff
Other Periodic Table Trends : Electronegativity, metallic nature and atomic radius.
Ionic, Covalent, and Metallic Bonds : Introduction to ionic, covalent, polar covalent and metallic bonds.
Molecular and Empirical Formulas : Introduction to molecular and empirical formulas. Calculating molec
The Mole and Avogadro's Number : Introduction to the idea of a mole as a number (vs. an animal)
Formula from Mass Composition : Figuring out the empirical formula from a molecules mass composition
Another mass composition problem : Another exercise converting a mass composition to an empirical fo
Balancing Chemical Equations : The art of balancing equations in chemistry!
Stoichiometry: Limiting Reagent : Stoichiometry problem where we have a limiting reagent!
Ideal Gas Equation: PV=nRT : Intuition behind the ideal gas equation: PV=nRT.
Ideal Gas Equation Example 1 : Figuring out the number of moles of gas we have using the ideal gas equati
Ideal Gas Equation Example 2 : PV/T is a constant. Figuring out the volume of an ideal gas at standard tem
Ideal Gas Equation Example 3 : Figuring out the mass of Oxygen we have.
Ideal Gas Example 4 : Figuring out the molar mass of a mystery molecule at STP.
Partial Pressure : Figuring out the partial pressures of various gases in a container.
States of Matter : Introduction to the states or phases of matter.
States of Matter Follow-Up : More on Plasma and Hydrogen bonds.
Specific Heat, Heat of Fusion and Vaporization : Specifict heat and phase changes: Calculating how m
Chilling Water Problem : How much ice at -10 degrees C is necessary to get 500g of water down to 0 degre
Phase Diagrams : Understanding and interpreting phase diagrams
Van Der Waals Forces : Van Der Waals Forces: London Dispersion Forces, Dipole Attractions, and Hydrogen
Covalent Networks, Metallic, and Ionic Crystals
Vapor Pressure : Vapor Pressure, Volatility, and Evaporation
Suspensions, Colloids and Solutions : Suspensions, Colloids and Solutions. The difference between Molar
Solubility : Solubility of salt and gas solutes in liquid solvent.
Boiling Point Elevation and Freezing Point Supression : Raising or lowering the boiling or freezing p
Introduction to Kinetics : Kinetics, activation energy, activated complex and catalysts.
Reactions in Equilibrium : Equilibrium reactions and constants.
Mini-Video on Ion Size : Correcting a mistake and learning a bit about ion size
Keq Intuition (mathy and not necessary to progress) : A probabilistic look at how molecules react to
Keq derivation intuition (can skip; bit mathy) : A more concrete attempt at showing how the probabili
Heterogenous Equilibrium : Ignoring the solution or the solid state molecules when calculating the equilibr
Le Chatelier's Principle : Le Chatelier's Principle regarding the "stressing" of reactions in equilibrium
Introduction to pH, pOH, and pKw : Autoionization of water into hydronium and hydroxide ions. pH, pO
Acid Base Introduction : Arrhenius, Bronsted Lowry, and Lewis Acids and Bases.
pH, pOH of Strong Acids and Bases : Calculating the pH or pOH of strong acids and bases.
pH of a Weak Acid : Calculating the pH of a weak acid
pH of a Weak Base : pH of .2 M of NH3 (weak base).
Conjugate Acids and Bases : Introduction to conjugate acids and bases
pKa and pKb Relationship : The pKa and pKb relationship between conjugate acids and bases (both of whic
Buffers and Hendersen-Hasselbalch
Strong Acid Titration : Strong acid titration and equivalence point
Weak Acid Titration : Equivalence point when titrating a weak acid
Half Equivalence Point : Figuring out the pKa of an unknown weak acid from the half equivalence point
Titration Roundup : Making sure you fully understand titration curves
Introduction to Oxidation States : Oxidation and reduction. Oxidation states.
More on Oxidation States : More practice calculating oxidation states
Hydrogen Peroxide Correction : Correcting an error in the last video regarding hydrogen peroxide.
Redox Reactions : Oxidation reduction (or redox) reactions
Galvanic Cells : Redox reactions to drive Galvanic Cells.
Types of Decay : Alpha, Beta, Gamma Decay and Positron Emission
Exponential Decay Formula Proof (can skip, involves Calculus) : Showing that N(t)=Ne^(-kt) descri
Introduction to Exponential Decay
More Exponential Decay Examples : A few more examples of exponential decay.
Macrostates and Microstates : The difference between macrostates and microstates. Thermodynamic equil
Quasistatic and Reversible Processes : Using theoretically quasi-static and/or reversible processes to sta
First Law of Thermodynamics/ Internal Energy : First law of thermodynamic and Internal Energy
More on Internal Energy : Getting more intuition of internal energy, heat, and work
Work from Expansion : How a system can do work by expanding
PV-diagrams and Expansion Work : Why work from expansion is the area under the curve of a PV-diagram
Proof: U=(3/2)PV or U=(3/2)nRT : Conceptual proof that the internal energy of an ideal gas system is 3/2
Work Done by Isothermic Process : Isothermic and Adiabatic processes. Calculating the work done by a
Carnot Cycle and Carnot Engine : Introduction to the Carnot Cycle and Carnot Heat Engine
Proof: Volume Ratios in a Carnot Cycle
Proof: S (or Entropy) is a valid state variable
Thermodynamic Entropy Definition Clarification : Clarifying that the thermodynamic definition of En
Reconciling Thermodynamic and State Definitions of Entropy : Long video explaining why entrop
Entropy Intuition : A discussion of what entropy is and what it isn't.
Maxwell's Demon : Maxwell's Demon: A thought experiment that seems to defy the 2nd Law of Thermodyna
More on Entropy : More clarification as to what entropy is and what entropy is not.
Efficiency of a Carnot Engine : Definition of efficiency for a heat engine. Efficiency of a Carnot Engine.
Carnot Efficiency 2: Reversing the Cycle : Seeing how we can scale and or reverse a Carnot Engine (to m
Carnot Efficiency 3: Proving that it is the most efficient
Enthalpy : Understanding why enthalpy can be viewed as "heat content" in a constant pressure system.
Heat of Formation : Standard heat of formation or standard enthalpy change of formation.
Hess's Law and Reaction Enthalpy Change : Using Hess's Law and standard heats of formation to determine
Gibbs Free Energy and Spontaneity : Intuition behind why spontaneity is driven by enthalpy, entropy and te
Gibbs Free Energy Example : Determining if a reaction is spontaneous by calculating the change in Gibbs Fr
More rigorous Gibbs Free Energy/ Spontaneity Relationship
A look at a seductive but wrong Gibbs/Spontaneity Proof
A look at a seductive but wrong Gibbs/Spontaneity Proof
Stoichiometry Example Problem 1 : Figuring grams of reactants and product produced from reaction of
Stoichiometry Example Problem 2
Limiting Reactant Example Problem 1
Empirical and Molecular Formulas from Stoichiometry
Example of Finding Reactant Empirical Formula
Stoichiometry of a Reaction in Solution
Another Stoichiometry Example in a Solution
Molecular and Empirical Forumlas from Percent Composition
Acid Base Titration : Using acid-base titration to find mass of oxalic acid
Spectrophotometry Introduction : Spectrophotometry, Transmittance, Absorbance and the Beer-Lamber
Spectrophotometry Example - Determining concentration based on absorb
Hess's Law Example
Vapor pressure example using the Ideal Gas Law
Change of State Example : Specific Heat Capacity and Enthalpy of Vaporization example
Carbon 14 Dating 1
Carbon 14 Dating 2