reversible reactions and rate of reaction

Question 1

how do you calculate the mean rate of a rate of reaction

Answer 1

change in quantity/time

Question 2

how does increasing the sa/concentration and pressure increase the rate of reaction

Answer 2

partcles cllide more frequently

Question 3

how does increasing the temperature increase the rate of reaction

Answer 3

parlicles collide more frequently because they have more energy which causes more successful collisions

Question 4

forward and backward reactions happena

Answer 4

at different rates

Question 5

what happens at the start of a reversible reaction

Answer 5

forward reaction would be fast as the are a lot of reactants and no products

Question 6

what happens as the reactants turn into products in a reversible reaction

Answer 6

forward reaction slows down and the backward reactants slow down

Question 7

what happens after a while in a reversible reactant

Answer 7

it evens out and reaches a state of equillibrium

Question 8

what is equilibrium

Answer 8

both reactants and products even each other out

Question 9

what does the position of the equllibrum depend on

Answer 9

temperature, pressure and concentration

Question 10

what does an increase in pressure do to the equilibrium

Answer 10

side with the side with less moles

Question 11

what does an increase in concentration do to the equilibrium

Answer 11

go the side with less concentration

Question 12

what does an increase in temperature do to the equillibrium

Answer 12

go to the endothermic side

Question 13

practical for disappearing cross

Answer 13

add hydrochloric acid +sodium thiosulphate
time how long it takes for the cross to disappear
increase concentration of solution and repeat the steps