 So the first thing We're going to do First thing we're going to do in these acid base reactions. This is another acid base reaction is what we're going to figure out what? Which ones that the acid and which ones the base? Can you guys figure it out already? Without even looking at the acid base the table which one which one is it? The left or the right is the acid the right is the acid is that what you said I didn't I couldn't hear it Okay, the right one is the acid right? Why would this be the acid and not this one? The negative charge what a negative charge is like to do especially negative charges that are on carpet carbana What do they really like to do? They like to deprotonate things okay, they like you want to think about it as like deprotonate, okay? Like it's going and grabbing okay, so where's the proton on this thing over here Let's just draw the mechanism before we even Go about figuring out pKa values. Okay, unless somebody has the pKa value. Does anybody figure it out? 15 okay, I know everybody wanted to say it. Okay, so let's identify the acid base. So which ones the acid? Right type of molecule is this did we call this a a car Van ion right a car banion why? Carbon with a negative charge, okay, so what is the car banion going to do mechanism wise deprotonate water? Tell me if I get it wrong So now what are we going to do go to the other side and do what write a product right so What's one of the products? Yeah, oh minus right how many? Loan pair electrons do I have around that oxygen three loan pairs very good? Or six electrons, you know now. What's the other molecule that's made? This thing plus a what? A hydrogen so how would I draw that draw the exact same and put a hydrogen on So that's so scary right I know it looks scary at first okay, but not not as scary as probably you thought it might be Yeah, so that's the next question thanks for leading me into that I should pay you for it or something so which one Which one is the conjugate acid and which one's the conjugate base so this is the what? Conjugate acid why would this be the conjugate acid? Okay, you can think of it that way or it's got the proton now the acidic proton okay, so base Acid so conjugate and this thing here would be the what? Conjugate base so now what do we want to figure out? The kq so we can determine what the arrows look like here right so the kq value. What do we need so kq? Equals what okay reactant acid over Okay, so what do we need to figure out now there? Yeah, okay, the product acid we're going to get access can anybody find that on your pk a table You treat it as an alkane. It's an alkane very good. Yeah, so you would treat it as an alkane So it would be 50 on our particular pk a table And of course if you're out there in video world listening to this and your pk a table tells you something different than these pk values use that pk a value on your particular For my class use my pk a table, okay Anyways, so What are we going to do now so to get the k a's of these things? we take this and Ten to the negative right so ten to the negative like that. So everybody okay with me doing that ten to the negative Fifty Okay, so is this going to be bigger than one or smaller than one just by looking at that bigger than one right What is it going to be and specifically? 10 to the 35 so that is much bigger than one right so this is like Essentially going that way. You know, I mean we might as well put a forward error But since we're doing equilibrium, right? We're going to put a little back in but this is very Understand that's very very good. So that must mean that this thing is very very what? Strong base. Yeah, very very base Carban ions are very very basic. So whenever you see a carban ion you expect it to be the base most of the time Okay, equilibrium arrows are going to look like what? Way long that way Little short that More questions Are there any more questions you guys want to ask about this one Yeah, you want to think that if the molecule has a negative charge you want to at least Entertain the possibility of it being a base, you know what I'm saying like that's one of the things you want to do There are oftentimes Polyatomic ions that have negative charges on them that aren't necessarily basic Okay, but things like carbons that have negative charges Oxygen that have negative charges nitrogens that have negative charges those are you gonna think of as basic Okay, so you can I think in both of the examples that we've done this morning We've seen an oxygen with the negative charge that was basic and this time we've seen so that's a good question Yeah This one here you're saying this k eq. Yes, exactly well over one you're saying yeah If it's bigger than one or if you're saying this exponent here is positive, right? Yeah, this exponent is positive It's gonna go that way if the exponent's negative It's gonna go that way if this is big the whole number is bigger than one and it's gonna go that way if the whole number Is less than one, right? It's gonna go that way If it's one that they're gonna be Equivalent, okay, and this if these pKa values were the same you would have a reaction in Equilibrium if that were the case then you would have a thing Kq that's one the other thing you can see is look at the Values of the acid and you can determine which way or the pKa values in which way the Reactions Any other questions on this one? Wonderful. Good job guys