 The main thing with these problems is that you've got to look at that particular PKA table that we're looking at. So the next problem is acting in a ketone. And if you don't know your functional groups, yeah, it's going to be tough for you to do these ones very quickly. So the first thing, we've got to figure out what's the what and what's the what, right? What is the, what do we try to figure out? The first thing we've got to figure out is what's the acid and then of course the other thing's going to be the biggest, right? So how do we figure that out? Look at the PKA table, right? So do we see either one of these things, whichever one you see first, let me know. HCl. HCl. Okay, what's the PKA? Negative 7. Negative 7. Yeah, that's pretty acidic, or not very acidic. Yeah, that's pretty acidic. So already we're thinking that's probably going to be the acid, right? But we should confirm that by looking at the PKA of a what? Alpha hydrogen. The ketone. Alpha hydrogen of a ketone, right? Because that's the most acidic hydrogen. And what are we firing there? Positive 20. Positive 20. So is that a stronger acid than the other one? No. Okay, not by a long shot, right? Well, protonation is going to enter base acid, right? That carbonyl oxygen, again, obviously in the ketone it's the only oxygen. Let's not put our reaction equilibrium arrows yet. Let's write our products, okay? So what are our products? What are we calling this thing here? Yeah, protonated ketone. And then, of course, just the chloride ion. Does it have a hydrogen on it? Can it be an acid? Our bronze-stead lowery acid is what we're really talking about. Obviously, things that don't have hydrogens on them can be Lewis acids. Not this thing, well, okay, not in this case. But since it doesn't have an H on there, you know, it shouldn't be expecting to find it on the PKA, okay? So what's the PKA of this thing? Anybody find it yet? Protonated ketone, negative seven. Protonated ketone, okay? So, uh-oh. Equilibrium. Yeah, so that's very good, very good assessment. Well, what do we want to do? So this thing doesn't have a PKA, okay? So, whatever, okay? So what's the acid and what's the base on this side? Left or right? Left is? Acid. Acid. Okay, this one? Base. Base. Okay? Acid or base? Right? Left isn't my right. It's acid. Acid or base, right? Okay, so remember, what did we say? We compared the relative strengths of those two acids, right? To tell, to qualitatively determine where the equilibrium lies. And when we see this, right, we can see that they're both the same. Okay, so we would predict, right, without doing our mathematics, that the equilibrium arrow would be equal. Okay? So you would have equal amount on both sides. Okay? Let's just see if that comes out. So, do you guys remember what the equation for KDQ is? What is it? KDA. KDA of the reactant acid over product acid. Hopefully you guys can already see what's going on, right? So what's the KDA of the reactant acid going to be? Ten. Ten to the negative? Negative seven. Negative seven. Or ten to the seventh, positive seven. And the bottom? Ten to the negative, negative seven. Negative seven. So what's ten to the seventh over ten to the seventh? One. So when your KDQ equals one, you're in equilibrium. You should remember that from general chemistry. Okay? So, what does it say? Which side does the reaction equilibrium favor? What would you say? Nine. Neither, right? Or neither? Are we cool with that one? Are there any questions? Are you guys getting this stuff? Okay, fairly straightforward. So it's not so bad of math, right? When everybody was like, ugh. When we first heard that there was math involved. Okay. So, we're cool? We're going to kill it?