Summary Chemical Equilibrium

CHEMICAL EQUALIBRIUM

DYNAMIC EQUALIBRIUM
Dynamic equilibrium – occurs when two processes are occurring
simultaneously at the same rate, in a closed system
Open system – a system in which both energy and matter can be exchanged
between the system and its surroundings
Closed system – a system in which mass is conserved inside the system but
energy can enter or leave the system freely


DYNAMIC CHEMICAL EQUALIBRIUM




 Concentration of reactants is high and rate of forward reaction is high
 Reactants being consumed rate of forward reaction decreases
 No products at start of the reaction, product is being formed reverse
reaction rate is high
 Products are being consumed rate of reverse reaction decreases

, FACTORS THAT EFFECT DYNAMIC EQUALIBRIUM
1) Change in concentration
2) Change in temperature
3) Change in pressure


LE CHATELIERS PRINCIPLE
Le Chateliers principle – when an external stress (change in concentration,
pressure or tempreture) is applied to a system in chemical equilibrium, the
equilibrium point will change in such a way as to counter act the stress


CHANGE IN CONCENTRATION
Formula:
Addition of HCL
 This will result in a reaction between the H2O and the HCL creating more
Cl- ions
 This will result in the reverse reaction being favoured and an increase in
the rate of the reverse reaction