 Okay, so let's do this one as the last reaction of the day. So this is another way to make an ether. So we already talked about making an ether from alkene. Let's make an ether from an alcohol now. So remember we talked about sodium hydride being a good non-nucleophilic phase. So in this case, sodium, of course, is always plus one charge. So the hydride anion is actually negative one, right? So sodium, the counter ion to that is going to be the hydride ion, which is a hydrogen with two electrons. So that makes this hydrogen very, very basic, not nucleophilic at all. So whenever it sees any sort of acidic hydrogen, even slightly acidic, like the one on alcohol, it'll go after it. So let's just erase this and draw it back over here. So what it'll do is it'll make hydrogen gas and you'll actually see it bubble out of the reaction plant. Very fast reaction. Alkoxide, so that was the acid phase. I think the alkoxide and H2 gas. Commonly you'll see a little arrow there in organic chemistry instead of that little G symbol that you might be used to from Jenkins. Anyways, so this is actually what we call a two step one pot reaction because you don't ever isolate. This is the intermediate, right? But you don't isolate it. You just leave that in the reaction flask and then add your alkyl halide to it, okay? So this has to be a non-sterically hindered alkyl halide because it's going to perform an SN2 reaction. So you can't have like a tertiary alkyl halide if you do it won't react. Anyway, so let's get that out because it's bubbled away. Let's just move this counter ion to somewhere else. Okay, so we dropped in our methyl bromide. So remember the SN2 reaction, we should get inversion and configuration. But it doesn't matter because there's no stereochemistry of forces. The methyl bromide, you'll see we made an ether out of that plus sodium plus and B-onlinus hanging out. So that's the only product, the sole product of this one. So you do that acid-base reaction, bubble the hydrogen away and then add your methyl bromide to the SN2 reaction. Everybody cool with that one? Okay.