Chemical Equilibrium and K Expressions

These flashcards cover key terms and concepts related to chemical equilibrium, the equilibrium constant, strong and weak acids, and K expressions.

Equilibrium Constant (K)

A numerical value that expresses the ratio of products to reactants at equilibrium.

Small k (k) vs Large K (K)

Small k refers to the rate constant, while large K refers to the equilibrium constant.

K_eq Expression

An expression representing the equilibrium constant, generally set up as products over reactants raised to the power of their coefficients.

Product Favoring Reaction

A reaction where a large K_eq value indicates that products are favored over reactants at equilibrium.

Strong Acid

An acid that dissociates almost completely in solution, resulting in a large K_a value.

Acetic Acid

A weak acid found in vinegar, which does not dissociate completely in solution, resulting in a small K_a value.

Solid and Liquid Phases in K Expressions

Solids and liquids do not appear in the equilibrium expression since their activity is defined as 1.

Manipulating K Expressions

Inversion is required for reverse reactions; multiplying coefficients affects K value exponentially.

Kc vs Kp

Kc is based on concentrations, while Kp is based on partial pressures of gases.

ICE Table

A table used to calculate equilibrium concentrations based on Initial concentrations, Change in concentrations, and Equilibrium concentrations.