Tricky topics
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What happens if the reactant concentration increases, to a system at equilibrium ?
• when the reactant concentration increases, more products will be formed. • this is because of Le Chatelier’s principle therefore, it will counteract the change-by equilibrium shifting to reduce the reactant concentration, as the reaction forming products is favoured • this decreases the concentration of the reactant.
What happens if the product concentration increases, to a system at equilibrium ?
• if the product concentration increases, equilibrium will shift to reduce the product concentration. • this is because of le chatelier’s principle therefore, the reaction forming reactants will be favoured
How can a system, decrease the concentration of a reactant ? Hint: favouring Hint #2: rate at which…
• a system, can decrease the concentration of a reactant by: • increasing the rate at which the reactant is used up, and favouring the forward reaction. • this increases the rate of formation of the product- until equilibrium is established again
Regarding pressure, what happens if the forwards reaction produces more molecules of gas ? Hint: yield
• if the forwards reaction produces more molecules of gas: • an increase in pressure will decrease the yield of products formed • ; a decrease in pressure, will increase the yield of product formed
Regarding pressure, what happens if the forwards reaction produces fewer molecules of gas ?
• if the forwards reaction produces fewer molecules of gas: • an increase in pressure, will increase the yield of product formed • ; a decrease in pressure, will decrease the yield of product formed
Regarding temperature, what happens if the forward reaction is exothermic ? Hint: increase and decrease
• if the forward reaction is exothermic: • an increase in temperature, decreases the yield of product formed • ; a decrease in pressure, increases the yield of products formed
Regarding temperature, what happens if the forward reaction is endothermic ? Hint: increase and decrease
• if the forward reaction is endothermic: • an increase in temperature increases the yield of product formed • ; a decrease in pressure, decreases the yield of product formed
What happens if the temperature increases, to a system at equilibrium ?
• if the temperature increases, the position of equilibrium will shift to reduce the temperature. • this is because of le chatelier’s principle therefore, the endothermic reaction will be favoured
What happens if the temperature decreases, to a system at equilibrium ?
• if the temperature decreases, equilibrium will shift to increase the temperature. • this is because of le chatelier’s principle so, the exothermic reaction will be favoured
What happens if the pressure is increased, to a system at equilibrium ?
• if the pressure is increased, the position of equilibrium will shift to reduce the pressure. • therefore the side of the reaction with fewer gas molecules, will be favoured
What happens if the pressure is decreased, to a system at equilibrium ?
• if the pressure is decreased, the position of equilibrium will shift to reduce the pressure. • this is because of le chatelier’s principle, therefore the side of the reaction with more gas molecules will be favoured