Where's the significance? Well, this means that now we can choose the PH of our bumper system by simply choosing an acid with PKA that's closest to our desired PH. So suppose, for example, I want my bubble system to have a PH of 4.7. Now, how I find the asset to use is I simply find the acid with the PKA value closest to 4.7. Now, I go online I find my table, I look up an acid with a PH that's a PKA closest to a PH of 4.7, and I find that it's acetic acid. So now I know, using this equation here, that if I choose my buffer sydney system to consist of acetic acetic acid, my PH of my bumper system will be 4.7.