 Okay guys, let's try to do this acid-base problem or this conjugate acid, conjugate base pair problem. Okay, so if you recall, do you know what it means? I think this problem actually points out some interesting things that don't really have to do with acid-base pairs, but have to do with the state of matter that ions are in when they're in solution relative to things that are pure materials like water. Okay, so notice that the state of water here is a liquid while all the ions are aqueous, because ions have to be aqueous to exist. They have to be dissolved in some sort of material to exist. You can have these charged substances that are dissolved into a media that will pull them apart. Okay, so but we still have acid-base pairs. So do you guys recall from last time how to do this? So what is the acid and what is the base? So the acid has a proton or a hydrogen that can be donated. Remember guys? So which one has lost the proton and which one has gained it? So if I look here, it should be more obvious if I look at this one, right? This is SO32 minus, and if we look over here, it's HSO3 minus, right? So what is that that's gained a proton, right? Is everybody okay with that? Remember proton and hydrogen ion are the same thing, right? Okay, so we could say, so does this thing have a proton to lose? Is there a hydrogen ion that it can lose? So which one is the acid and which one is the base then? Left or right? What's acid left or right? The left. Why does it have to be the left? Because it has to lose a proton, right? It has to have a proton to lose, right? So this has to be the acid. So what is this thing called then? The base. So whenever you have an acid-base reaction, you're going to have an acid and a base. So on the other side, what is this thing called? Conjugate base, right? Why? It's actually the other way to do the base. Yeah, or it's the one that lost the proton. Either way, it's the good enough explanation, right? So this is the conjugate base, right? It's the acid without its proton, okay? Remember, a proton is what? H plus, right? So if we lose H plus, what do we have? OH minus, okay? So what is this thing called then, everyone? That's not everyone. Come on, I know there's more of you in there. I can see more of you than that. Tell me, what is it called, everyone? Conjugate acid, right? It would be the one that's given up the proton, or if we looked at it from this way, it's the one that gained the proton from the base. Okay? From being the base before. Is everybody okay with that? Take that as a yes. Everybody looks away.