 Okay, so pictured here are the various forms of glutamic acid at various pH ranges So what we are to do in this problem is to order these forms going from a solution of low pH to high pH So when we have low pH, what does that mean for our solution? Very low pH means our solution is what? Acidic Acidic, right? So acidic we should expect to see what type of charges on our isle? Positive Positive charges, or a lack of what other type of charges? Negative Negative charges, okay? So is there any molecule up there that you see or any form of this glutamic acid that has a small number of negative charges relative to a high number of positive charges? D D, right? D is the most like that So in fact, this is the one you'll see at the lowest pH Okay, so remember our pH curves, right? So what we'll see is something that looks like or think about is something that looks like this Okay, so this is the polyprotic acid if you want to think about that Okay, so when we are increasing our pH or we're putting hydroxide ions into our solution, right? What's going to happen when we put hydroxide ions into our solution? It's going to raise the pH Raise the pH and what's going to happen to this molecule here? It's going to lose its protons Lose its protons, okay? So what would we expect going from here to the next form at the next highest pH? We would expect this except the loss of what? Maybe just the loss of the one proton One more proton, okay? So let's look for something that looks like this but is lost one proton Is there anything like that? C, right? And then the next one we should expect to look like C except what? Lost another proton Lost another proton, so which one is that? Of course, B is going to be the one that's found at the highest pH Why? Because we have the most negative charges relative to positive charges Okay, so now the second part of the question asked, which is the zwitterion? Okay, so do you remember what it means to be zwitterion? So it means to have a positive and a negative charge on you Okay, so which one is that? Yeah, it's going to be C So only positive and negative charge to cancel out Right So I guess I should have parted it So this here is the, I don't know if we can see that at the top Zwitterion So are there any questions on this?