How do I apply the ratio equation K = ([C]^y * [D]^z)/([A]^w * [B]^x) to a data table? I've gone through my lesson thoroughly and there is no demonstration of this, could someone please explain how it's done?

Question

aaronq · Answer

the squared brackets "[ ]" mean concentration, (molarity to be specific). So you would plug the concentrations of reactants or products or both, depending on what you have and are looking for.

anonymous · Answer

My table is
40 | 0
20 | 20
15 | 25
13 | 27
So would I plug in 13 and 27 for C and D?

anonymous · Answer

I'm looking for the ratio of products to reactants.

aaronq · Answer

you don't need the equation then. you would use the ratio at the very end (i.e. equilibrium) because the concentrations stopped changing.

anonymous · Answer

So it's simply 13:27?

aaronq · Answer

if you're looking for the ratio, then yeah. (this is assuming the last value is the equilibrium concentrations).

anonymous · Answer

It is, thank you! This stuff confuses me into thinking it's harder than it really is!