Question

How can I find the equilibrium constant of a reversed reaction?

Answer 1

Invert it....

Explanation:

We consider....

`A+BrightleftharpoonsC+D`

And `K_"eq"=([C][D])/([A][B])`

But CLEARLY....

`C+DrightleftharpoonsA+B`

And `K_"eq reverse"=([A][B])/([C][D])=K_"eq"^-1`