And our product D was also an acreage state. Now, this Q has the same meaning as this K. It's also a constant. And we can use or develop an expression for this reaction for this Q in the same way that we did here. And here it is. So, q is equal to the product of the concentrations of the products divided by the product of the concentrations of reactants. Now, what happens when these guys begin reacting forming C and D, while the concentration of C and D Begins to Increase.