H2S is known as Hydrogen sulfide. ChemHelps will try to teach you how to draw H2S Lewis Structure in this article. There are 4 steps we need to check before drawing the Lewis structure of H2S:
- First of all, we need to calculate the valence electrons of Hydrogen sulfide. H2S molecule has eight valence electrons.
- Then we need to find total electron pairs of H2S.
- The center atom should be determined to draw Hydrogen sulfide lewis structure.
- And lastly, we need to find lone pairs and charges of H2S molecule.
Let’s start to find out H2S Lewis Structure, shall we?
How to Draw H2S Lewis Structure
Let’s find valence electrons of H2S first.
1 – Valence electrons in H2S
H2S molecule has 2 H atoms and 1 S atom. H is the symbol of Hydrogen and S is the symbol of sulfur. H has 1 valence electron while S has 6 valence electrons. Let’s multiply these with atoms, 2*1 + 1*6 = 8 valence electrons. Valence electrons in H2S is 36.
The sulfur atom in H2S has a hybridization of sp3 type.
2 – Total electron pairs of H2S
Divide total valence electrons by two to find the total electron pairs of H2S. 8/2 = 4 electron pairs in H2S.
3 – Center atom of H2S
Between Sulfur and hydrogen, Sulfur is the least electronegative atom. That’s why the center atom of H2S is Sulfur. Because the least electronegative atom in the molecule is accepted as the center atom.
4 – Lone pairs and charges of H2S
There are 2 lone pairs in H2S. The charge of H2S is zero. The formal charge of H2S is zero. Here is H2S Lewis Structure according to these information:
Lewis Structure for H2S
H2S is a complex molecule. Since H2S has 8 valence electrons, you should be very careful while drawing the structure. Lewis Structure for H2S can be found by calculating valence electrons, total pair of electrons, lone pairs, charges and center atom. There are 4 steps we need to go off first before we draw Lewis Structure for Hydrogen sulfide.
Let’s find Hydrogen sulfide Lewis Structure now:
What we need first is to find valence electrons in H2S to draw H2S Lewis Dot Structure.
H2S has 1 sulfur atom and 2 hydrogen atoms. S has 6 valence electrons while H has 1 valence electron only. And it’s that easy to calculate total valence electrons.
2*1 + 1*6 = 8 valence electrons in H2S.
Total electron pairs in H2S:
If we divide total valence electrons in H2S by 2, the result would be total electron pairs in H2S. So, if we divide 8 by 2, it would be 4. There are 4 electron pairs in H2S.
The Center atom of H2S is the S atom. Because Sulfur’s electronegativity is lower than hydrogen’s electronegativity.
Lone pairs and charges:
Formal charge of H2S is zero. Now we can draw H2S Lewis Dot Structure:
Lewis Structure of H2S
Lewis Structure of H2S is a complex Lewis. It’s not easy to draw if you are not familiar with the topic. You should be checking Acetic Acid Lewis Structure or CO2 Lewis Structure first to get familiar with Lewis Structures before you try to draw Lewis Structure of Hydrogen sulfide.
Calculating valence electrons in h2s
How many valence electrons does H2S has? H2S is formed by 1 sulfur atom and 2 hydrogen atoms. Thus, it has 8 valence electrons.
Sulfur has 6 valence electrons * 1 atoms = 6 valence electrons from sulfur atom
Hydrogen has 1 valence electron * 2 atoms = 2 valence electrons from hydrogen atoms
In total 2 + 6 = 8 valence electrons
There are 8 valence electrons in h2s. Or we can say that H2S has 8 valence electrons.
Calculating total electron pairs in H2S
To find the total electron pairs in H2S, all we need to do is to divide the total valence electrons by 2. This means that there are 4 electron pairs in H2S. Because dividing 8 by 2 is equal to 4.
8/2 = 4 electron pairs in H2S.
H2S or Hydrogen sulfide has 4 electron pairs in total.
Determining center atom of Hydrogen sulfide
Sulfur is the center atom of the Hydrogen sulfide lewis structure.
Calculating lone pairs and charges of h2s
Formal charge of Hydrogen sulfide is 0.
Let’s draw lewis structure of Hydrogen sulfide to see lone pairs and charges.
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