Equilibrium Constant

Question 1

What is the Equilibrium Constant (Kc)

Answer 1

• used to show the relationship between the concentration of products and reactants at equilibrium
• used to determine which direction a reaction will proceed to reach equilibrium

Kc = (products)^a / (reactants)^b

Question 2

What is favoured with EqC

Answer 2

• if Kc > 10^4 –> eq. mixture contains a lot of products
• if Kc < 10^4 –> eq. mixture contains a lot of reactants

Question 3

Change in temperature on Kc

Answer 3

Endothermic
- increase in temp –> decrease on Kc

Exothermic
- decrease in temp –> increase on Kc

Question 4

Reaction Quotient (Qc)

Answer 4

• shows the relationship between the concentrations of products/reactants during any stage of reaction
• calculated like Kc
• if Q > K –> reverse reaction preferred until eq. reached –> favours reactants
• if Q < K –> forward reaction preferred until eq. reached –> favours products