1.6 Equilibria

Question 1

A reversible reaction…

Answer 1

has a backward and forward reaction

Question 2

Dynamic Equilibrium…

Answer 2

has no net change
conc of products and reactant stay the same
only reached in a closed system

Question 3

Le Chátellier’s Principle

Answer 3

If a reaction at equilibrium is subjected to charge, it will shift to oppose the disturbance

Question 4

A + B ⇌ C + D

What would happen if the conc of A + B was increased?

Answer 4

It would shift to reduce the conc and oppose the change, so would shift to the right (C + D)

Question 5

A + B ⇌ C + D

What would happen if the conc of C + D was increased?

Answer 5

It would shift to reduce the conc and oppose the change, so would shift to the left (A + B)

Question 6

A + B ⇌ C + D

What would happen if the pressure of C + D was increased?

Answer 6

It would shift to reduce the pressure and oppose the change, so would shift to the side with the least molecules, the right (A + B)

Question 7

A + B ⇌ C + D

What would happen if the pressure of A + B was increased?

Answer 7

It would shift to reduce the pressure and oppose the change, so would shift to the side with the least molecules, the left (C + D)

Question 8

What would happen if the temperature was increased in a reversible reaction at equilibrium?

Answer 8

Shift to cool the system, favoring the endothermic reaction

Question 9

What would happen if the temperature was reduced in a reversible reaction at equilibrium?

Answer 9

Shift to heat the system, favoring the exothermic reaction

Question 10

What is the equilibrium constant?

Answer 10

Kc, which is found by using the concentrations of the species in the equation:

[A][B]

Question 11

What is the equilibrium constant not affected by?

Answer 11

Catalyst addition;