equilibrium ap chem

Keq equation

Keq= concentration of products/concentration of reactants

Keq

equilibrium constant, only good at that temperature

Keq=Kc

mean the same thing

solids an liquids

not in equilibrium expressions

Keq>1

product favored

Keq<1

reactant favored

Keq~1

near equal amounts of reactant and product

At equilibrium…

the rates of the forward and reverse reactions are equal.

changing temperature

changes the value of an equilibrium constant

initial concentration

does not affect Keq

formula yo adjust Kp into Kc

Kp=Kc(RT)^deltan

delta n

total number of gaseous products - total number of gaseous reactants

saturated

completely dissolved and unable to dissolve anymore solute; leaves the undissolved substance at the bottom

solubility product

the ratio at saturation (equilibrium) in a dissociation equilibrium

Ksp>1

a solid mostly dissolves

Ksp<1

a solid is mostly insoluble

Q=Keq

reaction is at equilibrium

Q>Keq

reaction shifts left

Q<Keq

reaction shifts right

reaction quotient (Q)

Q=[Products]/[Reactants]

Reaction quotient

tells you which way the reaction needs to proceed to reach equilibrium