Chemical Equilibria

Question 1

What does dynamic equilibrium mean?

Answer 1

1. The rate of the forward reaction is equal to the rate of the backward reaction.
2. The concentration of the reactants and products stays constant.

Question 2

What is the Le Chatelier’s principle?

Answer 2

If there is a change in the conditions, the equilibrium will shift to oppose that change

Question 3

What effect does a change in concentration of the reactants have on the equilibrium?

Question 4

What effect does a change in concentration of the products have on the equilibrium?

Question 5

What effect does an increase in pressure have on the equilibrium?

Question 6

What effect does a decrease in pressure have on the equilibrium?

Question 7

What effect does an increase in temperature have on the equilibrium?

Question 8

What effect does a decrease in temperature have on the equilibrium?

Question 9

What effect does using a catalyst have on the equilibrium?

Question 10

Why must compromise conditions be used in the production of ethanol?
H = -46 kJ mol -1
70 atm
300 degrees
acid catalyst
C2H4(g) + H2O(g) = C2H5OH(g)

Question 11

What effect does an increase in temperature have on Kc?

Question 12

What effect does a decrease in temperature have on Kc?

Question 13

What effect does using a catalyst have on Kc?

Question 14

Why does using a catalyst not affect Kc?

Answer 14

A catalyst will increase the rates of the forward and backward reaction by the same amount.