The equilibrium constant - Kc

Question 1

What is the equation for the equilibrium law?

Answer 1

aA + bB = cC + dD

Question 2

What is the expression for Kc?

Answer 2

Kc = [C]^c x [D]^d / [A]^a x [B]^b

Question 3

What does [ ] represent?

Answer 3

The equilibrium concentration of a reactant or product

Question 4

What is the units of [ ] ?

Answer 4

mol dm-3

Question 5

What is the law of Kc value?

Answer 5

It is constant when concentration, pressure or catalyst changes, but not when temperature changes

Question 6

When will Kc have no units?

Answer 6

When there is the same number of moles of reactants and products

Question 7

What is Kc for the reverse reaction?

Answer 7

The reciprocal of Kc of the forward reaction

Question 8

How do you find equilibrium using an ice table?

Answer 8

I = initial mol - write out initial mol of reach reactant and product
C = change in mol - take away equilibrium mol from initial mol
E = equilibrium mol - write out equilibrium mol which is given
E - divide equilibrium mol by volume and then input in Kc expression