equilibria 1.4 Flashcards
when is a reaction in equilibrium
when a reaction does not go to completion
what are the proportions of reactants and products in the mixture
constant but not equal
why are the reactants and products constant
because the forward and backward rates are equal
what can describe equilibrium reactions
the equilibrium constant K
calculation for K
[products] / [reactants]
[C]^c [D]^d
——————
[A]^a [B]^b
meaning of square brackets
concentration of
units for K
no units
what is the ratio of K
products : reactants
when K is below 1
equilibrium lies to the left and favours the reactants
when K is above 1
equilibrium lies to the right and favours the products
the concentration of pure liquids and solids
1
what is K independent of
concentration, pressure and catalysts
what is K dependent of
temperature
what happens to K in exothermic reactions
increase in temperature = increase reactants = decrease K
what happens to K in endothermic reactions
increase in temperature = increase products = increase K
