 So here let's consider the reaction of the neutralization of stomach acid with antacid tablets, okay? So, stomach acid is essentially this molecule HCl, okay? And when we're doing acid-base reactions, you want to put that aqueous, so you'll remember to break that up into its ions, okay? And the antacid tablet we're using is effectively aluminum hydroxide. And we'll just say aqueous is what. These are going to react, this is a neutralization reaction, also a double displacement reaction, to form two molecules, okay? Remember a neutralization reaction will form water, right, and a salt. Do you remember that? You guys remember water and salt. So, those two molecules are going to be water as a liquid, right, plus a salt. What salt is it going to be? Yeah, aluminum chloride. So what's the formula for aluminum chloride? A, L, C, L, 3, right? And that's going to be in this case, okay? So is this equation balanced? No, so we got to balance it first, okay? We've got three hydroxides here, so they're going to have to have three protons to react with to make three water molecules, okay? So this is the only thing that's got protons on it, okay? So, put a 3 there, and a 3 here. And now we've got three Hs, three O Hs, that's going to make three waters, right? So we've got three CLs, and one AL, that's going to make one ACL3. Is that okay with everybody? Okay, so that's called the molecular equation, right? So this is what happens when you take an acid. This is the molecular equation. The total ionic equation is going to take everything that has AQ behind it and break it apart, right? Into its constituent ions. So remember this coefficient is associated with both the H and the CL, okay? So we're going to have three H plus AQS, and remember if it's an ion, it's dissolved into water, right? In this class. Three CL minus plus AL, what's the charge? Three plus the job, AQS plus what? How many? Three what? Minus, right? AQS, very good. This is OH minus called the hydroxide ion, okay? It's one of the polyatomics that you need to know. That you do know, I'm not sure. Do we break this thing up? No. Water is a stable molecule, it doesn't want to be broken up. Not to mention that it's got that L behind it, so it kind of gives us a clue. Plus breaking up, AL, see, AL3 plus AQS plus 3. So this is called the total ionic equation, sorry. Net ionic equation, you just cancel out everything that's on both sides, right? So H plus on both sides, no. Three CL minus on both sides, yes. Cancel, cancel, and AL3 plus AQS on both sides, yes. Cancel, cancel. So the net, 3H plus AQS plus 3OH minus AQS goes to 3H2O liquid, but 3, 3, 3, we're going to reduce that coefficient to 1, 1, 1. So the net ionic equation is H plus AQS plus OH minus AQS goes to H2O liquid, okay? So that's the net ionic. The cool thing about acid-base reactions is that's always the net ionic equation, okay? Always the net ionic equation. So got an acid-base reaction right that first, you know, if it helps you out, okay? That's always, always the net ionic equation. Is everybody okay with this? What are the spectator ions? I guess we should write that, too. Three plus, right, and C, all minus spectator ions. Any questions? Neutralization reaction.