Equilibria Kc Flashcards
what happens to reactions and concentrations in equlibria
in a reversible reaction forward and reverse reactions proceed at equal rates and concentrations remain constant
what is le chateliers principle
in a closed system the equlibrium will shift to oppose the change in conition
does a catalyst affect the position of equilibrium
no
what is the position of equilibrium
how much product and reactant is being made
what is yield
the more products are the favoured side of equilibrium the higher the % yield
what is the key phrase base for answering le chateliers principle
the equilibrium will shift to the 1 side to oppose 2 by 3
PRESSURE
talk about -
increase -
decrease -
talk about moles
increase pressure - side with less moles
decrease pressure - side with more moles
TEMPERATURE
increase -
decrease -
increase - endo side
decrease - exo side
CONCENTRATION
increase -
decrease -
increase - opposite side to whats increased
decrease - side which has decreased
CATALYST ADDED
increases the rate of forward and backward reactions equally so no effect on position of equilibrium
what is kc
equilibrium constant
how to calculate kc units
take the expression and substitute the units for conc in and simplify
what does a bigger kc mean
more products you get
how do you write a kc epression
add square brackets products on top reactants on bottom, add powers if there is big numbers in front
how do you find moles at equilibrium
I initial moles
C change in moles
E equilibrium moles
