 Okay, so let's go ahead and do this problem. It says, will a precipitate form when mixing the following two solutions? So notice it says solutions, right? So that should give us, so remember, first thing we're going to have to do is write a chemical equation for these things, okay? So it says potassium chloride and silver one nitrate, okay? So they're in solution form. So that should give us a clue as to how to write them in their chemical equation. So when you say potassium chloride, so potassium chloride looks like that. And because it's in solution, what's its state going to be? Equate, okay? That's what that means, solution. Okay? So potassium chloride, why is this potassium one chloride? That's not how it works. Why is that not how it works? Because potassium is where? Where is, where do you need to be to say one, two, three, that definition? Transition metal, right? And then the middle. Okay, so potassium is not a transition metal, it's a group one element. So, and then let's try this other one, silver one nitrate. So silver one or silver must be a what then? Transition metal, right? Why? Because it says one after. What about nitrate? Does anybody remember the NO3 minus one? So that's good, right? So we know that this is AG plus, right? And then NO3 minus one. So to balance those things out, they just cancel each other out, right? So there's not any twos and ones and things like that. So the formula here is AG NO3. So why don't we write in here this first equation? What is this thing called, do you guys remember? The molecular equation? If you don't remember that, something to remember, I would say, definitely. Okay, so now we've got a, do you guys know your precipitation rules? Yeah? What precipitates? Okay, it's something you're going to have to know before exam two, okay? Precipitation rules. Silver always precipitates with halogens, okay? So you're going to have this silver halide precipitating. In this case, it's going to be silver one fluoride. How do we know that there's a chart or something in the book? There's that table that I told you that you need to know. The other thing you know is that group ones never precipitate. You also know that nitrates never precipitate. So it's pretty straightforward as to which one it's going to do. So if you want to put that first, AGCL, because it's going to precipitate, what's the state of matter? Good job. Yeah, solve it. And then the rest of it is going to be what? Come on, guys. And it's going to be, what's the state of matter? Aqueous. Why aqueous? Because it doesn't precipitate. It's still in solution. Okay, so what is this equation called? Molecular equation. So we've got to write the other two. What are they called? Do you guys remember? The net ion. The net ion, but before that, we have to write the ionic or total ion. So the total ionic equation, or time, is going to be, look at everything that has aqueous behind it and break it up into its constituent ions. So this is aqueous, so it's going to be k plus aq CL minus aq. You guys can do that, right? AG plus aq NO3 minus aq goes to, what do we do for this one? Leave it alone. I guess a lot of people want to come up to the board today, huh? Nobody wants to talk. We could do that. That's cool. So what about this one? What are we going to do? Second part? Break it apart. And what do we do? How do we do the total ion, or the net ionic equation? Anything that's on both sides, right? You cancel it. So k plus on both sides? Yes. NO3 minus is that on both sides? What about CL minus? What about AG plus? What's the purpose of the different versions? So this is showing you the two solutions that you added together, okay? This is showing you what things get cancelled out. This is showing you your actual reaction. Oh, so the first one's not the actual equation. So why is this the actual reaction? Right? This thing still has what kind of ions? The spectators are in there, remember? So the spectators don't participate in the game, remember? So what are the spectator ions? SCM. Yeah? k plus. And what's the other one? NO3. So they don't participate in the reaction, right? What do we do here? What's k's? Does it react? No. K plus? Look, from here to here. Did it do anything? No. So it's not doing anything. The only things that are important, I can get this CL minus from NACL. I can get it from any sort of CL contributor, CL minus contributor. It doesn't have to be KCL. That's what this is saying. You don't necessarily need potassium chloride to do this. You just need something that gives you CL minus ions. Does that make sense? You don't necessarily need silver nitrate, although that's a good one to use. Net ionic equation. Any other questions?