7.2.1 I can deduce the equilibrium constant Kc for homogenous reactions

a. What can change the value of K
TEMPERATURE
b. The reaction must be at EQUILIRBIUM for the value of Kc to be calculated
c. Define the term homogeneous. WHEN THE REACTANTS AND PRODUCTS ARE IN THE SAME STATE. i.e. all gases, or liquid, or solid, or aqueous.
d. What is the rule to determine the units for Kc?

aA+bB = cC+dD

Kc= [C]cx[D]d
[A]ax[B]b

If the number of moles of the reactants equals the number of moles of the product then there is no unit. (c+d) - (a+b) = no units

If the no.moles of product > no.moles of reactant
(c+d) – (a+b) = 1 then Kc=moldm-3

If the no.moles of product < no.moles of reactant
(c+d) – (a+b) = -1 then Kc=mol-1dm3 because its 1/-1