M5 - Topic 3 : Calculating the Equilibrium constant (Keq)

Question 1

What is the equilibrium constant

Keq

Answer 1

a measure of the extent to which a given reaction has or will take place

Question 2

what is the equation for the equilibrium constant (Keq)

Answer 2

[Products] /[Reactants]

Question 3

what does a low Keq value indicate

Answer 3

a high concentration of reactants and relatively low concentration of products at equilibrium

Question 4

what does a high Keg value indicate

Answer 4

a high concentration of products and relatively low concentration of reactants at equilibrium

Question 5

what does a Keq value that = 1 indicate

Answer 5

half or the reactants have turned into products

Question 6

What is the equilibrium constant (Keq) equation for the general equation aA + bB ⇌ cC + dD

Answer 6

Keq = [C]ᶜ [D]ᵈ / [A]ᵃ [B]ᵇ

Question 7

what is the reaction quotient (Q)

Answer 7

determines whether a system is to the right or left of the equilibrium position

Question 8

what does it mean when Q is lower than Keq

Answer 8

reactants are in excess

The system will move to favour the product side

Question 9

what does it mean when Q is higher than Keq

Answer 9

Products are in excess

The system will move to favour the reactant side

Question 10

what does it mean when Q = K

Answer 10

the system is at equilibrium

Question 11

what do RICE tables stand for

Answer 11

Reaction
Initial concentration
Change
Equilibrium Concentration