equilibria Flashcards
how to dehydrate hydrated copper sulphate crystals and colour changes
heat it
from blue to white
how to decompose ammonium chloride
heat it
what is dynamic equilibrium the result of
the result of putting a reversible reaction into a sealed container
define dynamic equilibrium
forwards and backwards reactions are happening at the same rate
concentrations of reactants ad products remains constant
what is the position of equilibrium
the balance of reactants and products
what is Le Chateliers principle
equation shifts to counteract change
imposed
what does increasing a substance from the left side of the equation do to the position of equilibrium
it shifts the reaction right
because it counteracts the change imposed
what does increasing the temperature do to the position of equilibreum
it shifts it in the endothermic reaction
what does increasing the pressure do to the position of equilibrium
shifts it to the side with lower moles of gas
what effect on the position of equilibrium does a catalyst have
no effect
speeds forwards and backwards reactions equally
what happens when you remove a substance from an equilibrium
the equilibrium shifts towards that substance
what is KC
the equilibrium constant for gases only
how to calculate KC
conc of products times together over conc of reactions times together
( 2 moles of a substance = ^2 )
what is the scale of KC
0 - 1 - infinity
units of KC
depends - work out
how to work out conc of solids
you cant - concs of solids are always constant
how to check if substance is at equlibreum
if it matches book KC answer
what affects KC
only temperature
if reaction is exothermic and temperature increases, what happens to KC
KC increases
equilibrium shifts right
explain why changing concentrations and pressure can shift equilibrium but KC constant
changing concs or pressure takes mixture away from kc, then equilibrium shifts back
what is kp
partial pressure value of a reaction
