And along the curve, if we examine the PH of PKA of 9.7. So, if we're somewhere here, we see that the majority of these DNA molecules have dissociated. Why? Well, to answer this question, let's actually said these two equal to each other. So we know that the PH of our solution is equal to PKA. Now, PKA is equal to this equation negative log of ka, and ka is equal to the ratio of these two.