The equilibrium constant of a reaction in the reverse reaction is
the reciprocal of the equilibrium constant of the forward reaction.
The equilibrium constant of a reaction that has been multiplied by a number is
the equilibrium constant raised to a power that is equal to that number.
Types of equilibrium calculations
Calculation of an equilibrium constant
Calculation of missing equilibrium concentration or partial pressure
Calculation of equilibrium concentrations (or partial pressures) from initial concentrations (or partial pressures)
The equilibrium constant for a net reaction made up of two or more steps is
the product of the equilibrium constants for the individual steps