That simply means we're taking this guy and raising it to the negative one. This is equivalent to saying plus log of this guy to the negative one. But this guy to the negative one is simply reciprocating these guys. So negative log of this guy is the same as saying positive log of the reciprocal of this guy. So the concentration of conjugate base divided by the concentration of conjugate acid. So Now, A final formula states we find that PH is equal to.