Chemistry Khan Academy
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World Mentoring Academy
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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
Language: English
Professors: Ebenezer Appiah, Joshua Coleman, Michael Williams, Michael Williams, Ankush Dharkar
Units: 106
Lesson content
- Introduction to the atom : The atom, proton, neutron and electron
- Orbitals
- 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
- 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
- Half-Life
- 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
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