Chemical Equilibrium Flashcards
Physical Chemistry Unit 2
what is meant by a closed system?
where the chemicals are trapped and nothing is added or removed
when is a system in equilibrium?
when the concentration of the reactants is equal to the concentration of the products
Henri Le Chatelier theory:
“if a system is at equilibrium and a change is made in any of the conditions, then the system responds to counteract the change as much as possible”
what does K less than 1 indicate?
equilibrium lies more to the left (reactants)
what does K approx 1 indicate?
indicates that neither reactants nor products are favoured
what does K greater than 1 indicate?
equilibrium lies more to the right (products)
what can a hydrogen ion be considered as?
a proton
where can a hydrogen ion only exist?
surrounded by water molecules
what is he Bronsted and Lowry theory?
an acid can be considered a proton donor and a base a protons acceptor
what species is left when an acid donates a proton?
conjugate base
what species is left when a base accepts a proton?
conjugate acid
what is the term used to describe water acting as both an acid and a base?
amphoteric
what represents the ionic product of water?
Kw
what is the value of Kw at 25°?
1.0 X 10^ -14
