Reversible Reactions

Question 1

what is equilibrium

Answer 1

when the rate of the forwards reaction is equal to the rate of the reverse reaction and at equilibrium the concentrations do not change

Question 2

what happens to the position of equilibrium if there is an increase in temperature

Answer 2

the position of equilibrium will. move in the endothermic direction to absorb the added heat

Question 3

what happens to the position of equilibrium if there is a decrease in temperature

Answer 3

the position of equilibrium will move in the exothermic direction to give out heat

Question 4

what happens to the position of equilibrium if a reactant is removed

Answer 4

the position of equilibrium will move to the direction of the reactants to produce more of the reactant

Question 5

what happens to the position of equilibrium if a reactant is added

Answer 5

the position of equilibrium will move to the direction of the products to use up the added reactant

Question 6

what happens to the position of equilibrium if pressure is increased

Answer 6

the position of equilibrium moves to the the direction with fewer gas molecules to decrease the pressure

Question 7

what happens to the position of equilibrium is pressure is decreased

Answer 7

the position of equilibrium moves to the direction with more gas molecules to increase the pressure

Question 8

what is the effect of a catalyst on the position of equilibrium

Answer 8

there is no effect on the position of equilibrium because it increases the rate of the forward and reverse reaction by the same amount

Question 9

why is a catalyst used

Answer 9

so equilibrium is reached faster

Question 10

what conditions improve yield

Answer 10

high/low temperature

high/low pressure