 OK, so let's do another balancing reaction equation. So hopefully, now I'm going to make the assumption, and I'm sure you already do remember that anything with an OH minus the hydroxide here, like this magnesium hydroxide has, is a strong base. So hopefully you remember that from our discussions of acid and base. So we have a strong base here, and here, sulfuric acid is a strong acid. So whenever you have a strong base and a strong acid, they're going to react together to form water. So you see here, we formed water. So how does it form water? The OHs here? So how many OHs do we have here in magnesium hydroxide? Two of them, right? The OHs there will react with the Hs from the strong acids. How many Hs do we have here? Two, right? So we have OH plus H, right? That's H2O. So we have two of those, right? Two OHs plus H. So that's how many waters we're going to make that, OK? So that's it. This is a balanced chemical equation. So look, let's just confirm that what we've done is balanced, OK? So magnesium, and then remember what I said with the polyatomic ions, OK? So here, we're going to have OH minus, and I'm going to say H plus like that, and then a sulfate and a SO4 2 minus, OK? You don't always have to break up the polyatomic ions, OK? If you see them over here, that's the same thing, like the sulfate. Then you don't have to break them up, OK? So let's just go about writing what we have over here. So we've got magnesium, and I'm going to put H2O like that for the water, because we're going to eventually combine these two. And then we have the SO4 2 minus, like that, OK? I guess we could look at it as HOH, like that. That might be easier to see, OK? So how many OHs did we say we had? 2. And how many Hs from the strong acid? 2, right? So those two are going to combine to make 2 H2Os, like that. So let's just say H2O is 2, like that, or OHOH. Over here, HOH is 2, OK? How many magnesiums do we have over here? Just one? How many do we have over here? One? How many sulfates do we have on this side of the reaction? Just one, right? SO4 2 minus. How many do we have? Just one, right? How many do we have over here? Just one. So now let's check. Magnesium 1 and 1, is it balanced? Check. My waters, H2O, I have 2 here and 2 here. Are they balanced? But my sulfates. Also balanced. Also balanced, OK? So my reaction is balanced. So it doesn't always happen that these polyatomics stay together, OK? But if you see them staying together, or if you see an OH minus plus an H plus making water, you can do what I've done, OK? It makes your life a lot easier. Any questions on this one? OK, wonderful.