chemical reactivity

level2

Concentration - more reactants

if concentration of reactant increases, equilibrium shifts to the product side (forwards)

Concentration - more products

if concentration of products increases, equilibrium shifts to the reactant side (backwards)

Concentration - less reactants

if concentration of reactants decreases, equilibrium shifts to the product side (forwards)

Concentration - less products

if concentration of products decreases, equilibrium shifts to the reactant side (backwards)

Temperature - increasing

equilibrium moves towards endothermic side, more products are formed and KC value increases

Temperature - decreasing

equilibrium moves towards the exothermic side, more reactants are formed and KC value decreases

Catalyst

speeds up the rate of reaction in both forward and reverse direction equally, but makes no change to position of equilibrium

Pressure - increasing

the reactant/product side with less moles will be the side where the equilibrium lies

Pressure - decreasing

the reactant/product side with more moles, will be the side where the equilibrium lies

Le Chateller’s Principle

change in the conditions of a reversible reaction, the position of equilibrium will shift to try and counteract the change