 Okay, so when we're looking here, this question asks, what are the products of the following acid-base reaction draw the mechanism, okay? So it's actually a multi-stead question, but in order to draw that mechanism, you really should decide which one's the stronger of the two acids, although the nitrogen doesn't have any lone pair electrons on it, so you know it can't be the base, okay? So either way, you know, this thing over here is going to be the base, the acid, okay? But the best thing to do, either way, no matter what you know, is to look at your pKa table, and it'll tell you which one's going to be the acid and which one's going to be the base. How would you know which one's going to be the acid? It's going to have the what pKa? The lower pKa, right? Okay, so if you don't know that, make sure you know that before a couple weeks from now, okay? So you've got to look at the pKa table, it will be given to you, okay? So what's the pKa of protonated ammonia? Does anybody see that on me? Yeah. Yeah, I like to put plus 10 just to remind myself, because pKa can go back and forth from plus to minus, okay? And what about an ester? So this is not a protonated ester or anything, it's just a regular ester, right? Is that an ester? Protonated ester, right? Seeing any other ester on there? Yeah, it's the 25 one. Alpha hydrogen. Why? Because the alpha hydrogen is the most acidic hydrogen on the ester. You guys know that, right? Okay. So anyways, which one is the stronger ester? The one on the right or the lower? The right. Right? Because it's low, okay? So this is going to be the base, okay? And these carboxylic acid derivatives, if you've got an electron donating group, right, the base is going to be, it's usually going to be this carbonyl oxygen, okay? Especially, I guess, if you have an electron donating group, I should say. So in other words, you better not be writing a mechanism from this oxygen. So, now we don't know what the equilibrium arrows are yet. We're going to put those in later. But we do know the product, so go ahead and write the product. Okay, so now what is this thing here? What did we say it's be gay was? Sticks. Negative sticks. And what is this thing here? Ammonia. Right? And what's its be gay? Third state. Right. Use my table please. 35, okay? So, which is the acid on this side? The left or the right? The right. So this is the acid, right? So this must be the, okay? Acid or base? Tell me. Acid is left, right? So the base must be here, right? Okay, so out of the acids, which one is the stronger of the two acids? The one on the right or the product acid or the reactant acid? Product acid. Product acid is the strong acid. So this must be the weaker of the acids, right? Which one's the stronger base? The one on the right, right? Because the bigger the number is, the stronger it is. So already you should be able to predict which way the arrows are going, right? To the... A strong acid. Yeah, because a strong acid is what? Relatively something to this. The weak acid. Relatively unstable, right? That's why reactions occur, okay? So now we can figure out, well, what's the K and Q, right? I mean, this is just qualitative, right? We can actually figure it out and then definitely say what this is, and that's what we're going to do. So the K and Q, I give you an equation of how to do that, right? What is that? The Ka of the reactant acid divided by K of the product acid. So do we know those numbers? K of the reactant acid. 10, well, it's always 10 to the negative pK, okay? So in this case, it's 10 to the negative... What? Tell me how it goes. 10 to the negative 6. To the negative negative 6, right? Which is going to be the positive 6. So the K and Q of this, if we're predicting this, right? The K and Q should be what? Less than, greater than, equal to... What should it be? We're predicting this. Less than and what? 1, okay? You have to look at the paper already to see that. You can even know this. So less than 1, what is the K and Q in here? So 1 times 10 to the negative 16. Is that less than 1? Does that go with our prediction that the strong acid goes to the weak acid or the strong things go to the weak things? Right, because those are more unstable. So this, no units, by the way, tells you that this is what you're looking for. So the last thing is, again, we've already said this, which side does the reaction favor, equilibrium favor, and it's the reactants. Any questions before we kill this one?