Using the general properties of equilibrium constants -...

Using the general properties of equilibrium constants
At a certain temperature, the equilibrium constant for the following reaction is
:
Use this information to complete the following table.
You can solve this problem by using the general properties of equilibrium constants
The size of tells you whether reactants or products dominate at equilibrium.
If is large, for example greater than , then products dominate the equilibrium
composition . If is small, for example smaller than , reactants dominate. If
moderate, for example in the range of to , then neither reactants nor products
will dominate.
:
is

In this case is large, so products will dominate. That is, at equilibrium there will be
very little and .
for the reverse reaction equals the inverse of for the forward reaction.
You can see this by comparing the equilibrium constant expressions :
Here's the forward reaction and its equilibrium