Once we mix these two guys, there are two methods we can use use to find the PH of the buffer solution. Our first method involves the Henderson Hasselblack formula. And if you haven't seen this formula before or you don't know where it comes from, check out the link below. The second method is to simply use the Ka. So let's do the first method first. So our PH is equal to PKA plus or log of concentration of conjugate base divided by the concentration of conjugate acid.