Hydrogen sulfide is a colorless gas v a molar fixed of 34.08 g·mol−1. That is poisonous and flammable through a smell like rotten gas. The is additionally dangerous for the environment.

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In this article, we will comment on the complying with things- Hydrogen sulfide (H2S) molecule geometry, lewis structure, electron geometry, its shortcut angle, polarity, hybridization, and dipole moment.

Hydrogen sulfide is created by anaerobic cradle in which microorganisms failure the organic issue in the absence of oxygen. It additionally occurs in volcano gases and in fine water also. It can also be derived by that is separation indigenous sour gas.

Hydrogen sulfide have the right to be created by as soon as ferrous sulfide treats v a strong acid like HCl in typical lab preparation.

⇒ FeS + 2 HCl → FeCl2 + H2S

Most metals and also non-metals sulfides after ~ exposure to water castle liberate Hydrogen sulfide.

⇒ 6 H2O + Al2S3 → 3 H2S + 2 Al(OH)3

H2S has many names like- Dihydrogen monosulfide, sewage system gas, dihydrogen sulfide, sour gas, sulfane, sulfur hydride, etc.

Other properties of Hydrogen Sulfide

H2S is slightly denser 보다 air.The hydrogen sulfide chemical formula is H2S or SH2.It has actually a molar mass of 34.08 g·mol−1H2S has a boiling suggest of −60 °C and also a melting allude of −82 °C.It has actually a pungent smell, prefer rotten eggs.It has a vapor press of 1740 kPa.H2S magnetic susceptibility is −25.5·10−6 cm3/mol.Hydrogen sulfide act together a reducing agent.Its refractive index is 1.000644
Name that MoleculeHydrogen sulfide
Chemical formulaH2S
Molecular geometry of H2SBent
Electron geometry the H2STetrahedral
Bond angle92.1º
Total Valence electron for H2S8
The formal fee of H2S0

Page Contents display
1 exactly how to attract H2S/SH2 lewis structure and also find it's hybridization?
2 What room the electron and also molecular geometry the H2S?
3 Another method to find electron/molecular geometry the H2S
4 Is H2S polar or non-polar and also its dipole moment
6 summary

How to draw H2S/SH2 lewis structure and also find it's hybridization?

H2S Lewis structure consists of two hydrogens and also one sulfur atom. Sulfur is the main atom and also contains 2 lone pairs whereas both hydrogen is associated to the central atom through the help of a single bond.

Lewis’s structure of SH2 is really useful to determine its electron geometry, molecule shape, variety of shared pair, and also lone pair electrons.

Follow these actions to draw the lewis dot structure for H2S

Step 1: In the very first step, identify the complete valence electron existing in H2S. As we recognize hydrogen only has actually one valence electron in its last shell and Sulfur belongs to the 16th team in the routine table therefore it includes 6 electrons in its last shell.

⇒ Valence electron that hydrogen = 1×2 = 2

⇒ Valence electron the Sulfur = 6 

∴ total valence electron accessible for illustration the H2S lewis framework = 1×2 + 6 = 8 valence electron


Step 2: Find the main atom for drawing the lewis dot framework for H2S. To identify the central atom in the H2S molecule you have actually two ways.

Find the main atom by recognize the the very least electronegative atom in the H2S molecule. Clearly, sulfur has less electronegativity compare to hydrogen since hydrogen has actually a greater tendency to entice electrons, also, hydrogen only requirements two-electron to satisfy its valence shell.Place the atom at the facility which has a higher valence. Clearly, Sulfur has actually a valence power of 6 and Hydrogen has actually only 1. So, Sulfur have to be paced at the facility in the lewis diagram.


Step 3: Now build the structure of H2S through connecting the solitary bond to the main atom.

Step 4: After put the main atom and connecting with it a solitary bond, we have actually to satisfy the octet dominion for every atom in H2S to maintaining the last necessity of the lewis diagram.

Hydrogen atom needs only two electrons to meet their octet and also sulfur atom need eight electron to satisfy the octet.

The hydrogen external shell is currently full due to the fact that it shares 2 electrons already with the help of a solitary bond. So, no need to placing electrons about hydrogen.

Now because that Sulfur, we need 8 electrons but only 4 electrons are common with the aid of two solitary bonds. So, we need to place 4 an ext electrons approximately sulfur to finish its octet rule and fulfilling the criteria for illustration the lewis dot structure for SH2.

Lewis framework for SH2 or H2S

Step 5: currently in the final step, minimize the fees on atom that H2S by convert lone bag to covalent bonds.

But there is no charge on the atom(formal fee on hydrogen and sulfur is zero), so, no have to make any type of covalent bond.

This lewis framework is additionally called Dihydrogen sulfide lewis structure or dihydrogen monosulfide lewis structure.

Hybridization of H2S

To calculate the hybridization that H2S just follow 3 an easy steps.

1. uncover the number of atoms attached come the main atom. Clearly, just two atoms(hydrogen) space attached to the sulfur central atom.

2. count lone pairs on that central atom. So, 4 lone pair electrons are present about sulfur, which method sulfur has two lone pairs.

3. include the variety of attached atom to the central atom + Lone bag of that main atom

∴ 2 + 2 = 4

So, 4 way hybridization that H2S is Sp³.

The molecular geometry of H2S is bend because the two lone pair electron on sulfur central atom repel every other too as nearby bonded pair electrons, together a result, this electron pair(lone pair and bond pair) take away the position where the repulsion i do not care minimum and they attains the stability(no additional repulsion pressure exist in electron pairs).

Hence, the final shape or molecule geometry of H2S shows up like a bent structure or V-shaped.


According to the VSEPR theory, to reduce the repulsion. The electron pairs relocate to maximum angle apart from every other and also become stable.

Also, electron geometry because that H2S is tetrahedral because 4 electrons which do 2 lone pairs approximately a sulfur atom space arranged in a tetrahedral geometry.

H2S molecular geometry or shape

To determine the electron and also molecular geometry of H2S, its lewis structure and also VSEPR concept play crucial role.

Electron geometry considers every electrons as well lone bag to recognize the geometry that H2S whereas molecule geometry only considers bonded atom of the molecules to determine the shape of H2S.

Another means to find electron/molecular geometry that H2S

AXN technique is an extremely useful to identify electron geometry or molecular shape for H2S. But you have to make a lewis framework of H2S for making use of this method.

 AXN method

A to represent the main atom.X represents the bonded pair that electrons.N represents the lone pair the electrons.

As per H2S lewis structure –

Sulfur is the main atom.2 bonded bag of electrons are attached come the central atom sulfur.2 lone pairs on the sulfur main atom.

Therefore, the share formula of hydrogen sulfide is AX2N2 because that finding the molecular or electron geometry that H2S. 

So, AX2N2 offers the molecule geometry the H2S is bent and also the electron geometry is tetrahedral follow to VSEPR form Chart.


The bond angle of H2S is 92.1°.


The polarity that H2S is dependent ~ above its molecular shape, electronegativity, and dipole moment.

H2S is non-polar since the electronegativity the bonds(H-S) is lesser 보다 0.5, as Hydrogen electronegativity is 2.20 and sulfur electronegativity is 2.58 and also their difference is 0.38 which causes H2S to become nonpolar in nature.

According to the Pauling scale, if the difference of an atom’s electronegativity is less than 0.4, the bond is thought about nonpolar and also vice-versa.

H2S can additionally assume to be a polar molecule because it is non-linear and it has bent molecular geometry and central atom S is much more electronegative than H, therefore, the an unfavorable pole is on the S atom. So, H2S has actually some dipole minute which renders it a polar molecule.

Technically, due to the very weak polarity nature that H2S, it is thought about a non-polar molecule. 

The dipole minute of H2S is 0.95D and in the math term, it deserve to be expressed as-

product of dues of 2 atoms and the distance in between them

D = Q * R 

⇒ D denotes dipole moment

⇒ Q denotes fee on atoms

⇒ R denotes the distance between atoms

Uses that Hydrogen Sulfide

It is supplied to develop sulfur and also sulfuric acid.It is offered to produce pesticides, leather, and also pharmaceuticals.It is likewise used in nuclear power plants because that the manufacturing of hefty water.H2S is supplied in chemistry analysis.It can also be offered in farming as a disinfectant.

∴ The bond angle of H2S = 92.1°

Why the molecule geometry the H2S is bent whereas its electron geometry is tetrahedral?

As we currently discussed, “electron geometry is figured out with the aid of both lone electron pairs and bonds pair in a molecule whereas molecule geometry figured out using just the bonds existing in the molecule”.

According come the H2S lewis structure, the central atom has actually 2 lone pairs and also 2 bonded pairs, hence, follow to the VSEPR theory, H2S has actually 4 regions of density(2 lone bag + 2bond pairs) approximately the central atom(sulfur).

∴ 4 regions that electron thickness always type a tetrahedral geometry, hence, the electron geometry of H2S is tetrahedral.

While calculating the molecule shape, we will certainly not take into consideration the lone pair as “the molecule shape has to do v the shape of the really molecule, no the electrons, so they room not accounted for in that sense”.

But we can’t disregard the result of lone pair ~ above a bond angle while calculating the molecular form of the molecule.

As there are two lone pairs current on the sulfur main atom in the H2S molecule, hence, it will certainly contract the link pair, and this renders its shape shows up like a bending structure.

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Therefore, the molecular geometry or shape of H2S is bent while its electron geometry is tetrahedral.