Consider a reversible chemical reaction: aA + bB ⇌ cC + dD
The equilibrium constant, Kc = \(\frac{[C]^c [D]^d}{
[A]^a [B]^b}
\)
Consider the reverse reaction:
cC + dD ⇌ aA + bB.
The equilibrium constant, Kc is:
Kc = \(\frac{[A]^a [B]^b}{
[C]^c [D]^d}
\) = \(\frac{1}{K_c}\)
Thus, equilibrium constant of the reverse chemical reaction (Kc) is the reciprocal of the equilibrium constant Kc