1.7 - simple equilibria and acid-base reactions

Question 1

Definition - dynamic equilibrium

Answer 1

when the forward and reverse reactions occur at the same rate

Question 2

Definition - reversible reactions

Answer 2

a reaction that can go in the other directions depending on the conditions

Question 3

Factors affecting equilibrium position

Answer 3

> change in concentration
change in pressure
change in temperature

Question 4

Le Chatelier’s principle

Answer 4

States that if a system in dynamic equilibrium is subjected to change in conditions the position of equilibrium shifts to minimise the change and to restore equilibrium.

Question 5

Effect of change in concentration

Answer 5

[] increases - shifts to side where[] decreases

Question 6

Effect of change in pressure

Answer 6

P increases - shifts to side of least gas moles

Question 7

Effects of change in temperature

Answer 7

T increases - shifts to endothermic direction

Question 8

Effect of catalyst

Answer 8

> speeds up a chemical reaction
increase the rate of forward and backward reaction to same extent
no effects on equilibrium