Le Chatelier

• increasing concentration of a reactant or products shift the equilibrium position to the other side
• decreasing concentration of a reactant or product shifts the equilibrium position to the same side
• increasing pressure shifts equilibrium to the Side with the fewest gas molecules
• increase in temperature the equilibrium shifts in the endothermic direction
• decreasing temperature shifts the equilibrium in the exothermic direction
• a catalyst speeds up the forward and backwards reaction but doesn't effect the position of equilibrium