Dynamic Equilibrium

Question 1

what is a reversible reaction

Answer 1

• one where products can react with each other to produce the original reactants
• the reaction can go both ways

Question 2

what is an example of a reversible reaction

Answer 2

the haber process

Question 3

what is used to show the the reaction goes both ways when writing it out

Answer 3

two broken arrow symbols pointing in opposite directions making a seemingly equal sign

Question 4

what happens to the concentrations of a and b as they react and what does it cause

Answer 4

• their concentrations fall

- meaning this reaction, the forward reaction, will slow down

Question 5

what happens to the concentrations of products c and b as they are being made from a and b and what does it cause

Answer 5

• their concentrations rise

- causing this reaction, the backwards reaction, to speed up

Question 6

when is equilibrium in a reaction reached

Answer 6

when the forward reaction is happening at exactly the same rate as the backwards reaction

Question 7

what are the two main facts about equilibrium

Answer 7

• both reactions are still happening

- but there is no overall effect

Question 8

what is a dynamic equilibrium

Answer 8

• when the forwards and the backward reactions are both happening at the same time and rate
• and the concentrations of reactants and products have reached a balance and wont change

Question 9

what condition must be met in order for an equilibrium reaction to occur

Answer 9

• the reaction must take place in a closed system

- meaning that none of the products or reactants can escape

Question 10

what do you need to know about the amount s of products and reactions in an equilibrium reaction

Answer 10

when a reaction is at equilibrium it doesnt mean the amounts of the products and reactants are equal

Question 11

what does it mean if an equilibrium lies to the right

Answer 11

• it means that there are lots of products and not much of the reactants
• or the concentration of products is greater than the reactants

Question 12

what does it mean if an equilibrium lies to the left

Answer 12

• it means that there are lots of reactants and not much of the products
• or the concentration of reactants is greater than the products

Question 13

what does the exact position of equilibrium in a reaction depend on

Answer 13

• the conditions

- as well as the type of reaction it is

Question 14

what three things can change the position of an equilibrium

Answer 14

• temperature
• pressure
• and concentrations of reactants or prodiucts

Question 15

how does heat affect the equilibrium reaction of ammonium chloride = ammonia + hydrogen chloride

Answer 15

• heating the reaction moves the equilibrium to the right
• making more ammonia and hydrogen chloride
• while cooling the reaction moves the equilibrium to the left
• making more ammonium chloride