Doolan's Chemistry Class
EK6A1, 3, 4 - General Equilibrium
EK6A2 - Calculations involving K
EK6B - Factors Affecting Equilibria
EK6C1 - Calculating pH of Weak Acids and Bases
EK6C2a - Acid-Base Properties of Salts
EK6C2b - Buffers
EK6C2c - Acid-Base Titrations
EK6C2d - Indicator Selection
EK6C3 - Solubility Equilibrium

Equilibrium
Any bond or inter-molecular attraction can be formed and broken. These two processes are in a dynamic competition, sensitive to initial conditions and external perturbations.


Section 1: Chemical equilibrium

Equilibrium is a dynamic state that is reached as the rate of the forward reaction equals the rate of the reverse reaction. Equilibrium is a stoichiometric point that is reached as reactants are converted to products. When at equilibrium the ratios of the reactants to products does not change and the value of the ratio is defined as the equilibrium constant, K.
Assigned Lecture:
Lecture Summary:
Supporting Lectures:
Equilibrium Expressions
Concept Map: Reversible Reactions
Doolan's Notes: Reversible Reactions
Key Q's and Vocab: Reversible Reactions

Assigned Lecture:
Lecture Summary:
Supporting Lectures:
Q -vs- K
QCK Table

Assigned Lecture:
Lecture Summary:
Supporting Lectures:
QCK Table
5% Rule
Concept Map: Equilibrium
Doolan's Notes: Equilibrium
Key Q's and Vocab: Equilibrium

Assigned Lecture:
Lecture Summary:
Supporting Lectures:
Value of K
Concept Map: Equilibrium Constant, K
Doolan's Notes: Equilibrium Constant, K
Key Q's and Vocab: Equilibrium Constant, K

Section 2: Disturbing equilibrium

At equilibrium, the rates of the forward and reverse reactions are equal. Any stress that would affect the rates disproportionately will cause a shift away from equilibrium and give the reaction a net direction. The system will proceed to reestablish equilibrium under the new conditions. 
Assigned Lecture:
Lecture Summary:
Supporting Lectures:
Q -vs- K and Direction
Concept Map: LeChatelier's Principle
Doolan's Notes: LeChatelier's Principle
Key Q's and Vocab: LeChatelier's Principle

Assigned Lecture:
Lecture Summary:
Supporting Lectures:
Concept Map: Equilibrium Disturbances
Doolan's Notes: Equilibrium Disturbances
Key Q's and Vocab: Equilibrium Disturbances


Section 3: Acid-Base and Solubility Equilibrium

Chemical equilibrium plays an important role in acid-base chemistry as well as solubility. In acid-base chemistry the gain/loss of a proton is a reversible process that reaches equilibrium quickly. In terms of solubility the dissociation of a solid solvent is also a reversible process that reaches equilibrium quickly.
Assigned Lecture:
Acid-Base Equilibrium
Lecture Summary:
Supporting Lectures:
pH Calculations
Concept Map: Acid-Base Equilibrium
Doolan's Notes: Acid-Base Equilibrium
Key Q's and Vocab: Acid-Base Equilibrium

Assigned Lecture:
pH & Buffers
Lecture Summary:
Supporting Lectures:
Is it a Buffer?
Buffer pH Calculation
Concept Map: pH and Buffers
Doolan's Notes: pH and Buffers
Key Q's and Vocab: pH and Buffers

Assigned Lecture:
Solubility Equilibrium
Lecture Summary:
Supporting Lectures:
Concept Map: Solubility Equilibrium
Doolan's Notes: Solubility Equilibrium
Key Q's and Vocab: Solubility Equilibrium


Section 4: Equilibrium Constant Relationships

The equilibrium constant can be related to Gibbs Energy and temperature.
Assigned Lecture:
G and K Relationship
Lecture Summary:
Supporting Lectures:
Concept Map: G and K Relationship
Doolan's Notes: G and K Relationship
Key Q's and Vocab: G and K Relationship