SOLVED:Predict the electron pair geometry, the molecular shape, and the bond angle for a hydrogen sulfide molecule, H2 S, using VSEPR theory.

H2S (Hydrogen sulfide) Molecular Geometry, Bond Angles
H2S (Hydrogen sulfide) Molecular Geometry, Bond Angles

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Charles H. Corwin

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Chapter 13, Problem 75

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Predict the electron pair geometry, the molecular shape, and the bond angle for a hydrogen sulfide molecule, $\mathrm{H}_{2} \mathrm{~S}$, using VSEPR theory.

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everyone in this video, we’re going to be talking about that spur theory, which is the valence shell, electron propulsion, and how we can use that theory in order to help us determine the not the electron pair geometry, the shape as well as the bond angles of a given molecules. So I don’t know where the definition of dementia electric propulsion. What it allows us to do really is that it predicts the geometry of individual molecules just based on the number of lone pairs and bonds within. So if we wanted to take something like, for example, uh the hydrogen so fine. So the formula would be H. Two S. And we wanted to know using vesper theory. Um election part geometry shape as well as its bond angles. Well, we have to start by drawing the lose thought structure. And so when we have something like this, we know that um based on the drawing here, sulfur is going to have to go in the middle. So let’s start by actually just drawing the molecule itself. So we have sulfur. You know, sulfur is going to want to make um at least four bombs. That’s the max that can make. So it’s gonna so it’s going to have like around it, a total of eight electrons. Right? But the thing here is that we only have two hydrogen atoms. So those are only going to take up about um four of those electrons overall. Right? So we can just go ahead and do uh we can do this. Let me go ahead and make that a little bit straighter here. We’re just drawing it. We’re not trying to make it necessarily accurate for the moment. So, we see here, let’s count the number of electrons that are around. So for remember each uh, bond itself, it counts as two electrons. That’s to them four. So we’re missing for more electrons. So those other four electrons are going we’re going to have to put them on sulfur as lone pairs. So We’re going to do 1,212 now. Let’s count the number of electrons that are around. So for we have 2468 Perfect. That satisfies that octet rule and it satisfies the octet or the octet rule for hydrogen. The october for Haijun, if we recall is not necessarily an octet for it by tradition, um it’s octet is two electrons not ate like a lot of the other elements in the periodic table. So yeah, it’s for every single atom and um die hydrogen sulfide are fulfilled. Now we just drew uh this molecule just so we can dry and we can get feel for how many bonds are being actually made and how many lone pairs are actually present. So we can see that there’s actually two bonds and there’s too long pairs. But there’s overall four pairs of things. So there’s four things around it. We have to line pairs to hydrogen bomb two hydrogen atoms attached. So that’s four things.…

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