7.2 Equilibrium Law and Equilibrium Constant Flashcards
What is equilibrium law?
A mathematical description of a chemical system at equilibrium
What is equilibrium law also known as…
Law of mass action
Who came up with the equilibrium law?
Norwegian Chemists Guldberd and Waage
What is the equilibrium constant?
A constant numerical value with no units that defines the equilibrium law of a system
In what scenario is the K value the same?
It is the same even if there are different initial concentrations
What can change the K value of a system?
Temperature
What can the equilibrium constant help determine?
The equilibrium position of a system
What is K mathematically?
The ratio of the rate of the reverse reaction to the rate of the forward reaction (products to reactants)
What is a homogenous equilibrium?
Where all reactants and products are in the same state of matter
What is a heterogenous equilibrium?
Where there is 1 or more reactant/product present with more than 1 state
Which states can be used and ignored in the rate law equation?
Only gases and aqueous solutions can be used, solids and liquids are excluded/ignored
What does the magnitude of K indicate?
- Big K: High concentration of products; products favored and rxn shifts right
- K = 1: Concentration of reactants is relatively the same to concentration of products
- Small K: High concentration of reactants; rxn favors reactants and rxn shifts left
For a reverse reaction, the K value is…
The reciprocal of the K value of the forward reaction
