Is hydrogen sulphide a polar compound?

In summary, while H2S has a bent molecular geometry and therefore has a dipole moment, it is only slightly polar due to the small electronegativity difference between sulfur and hydrogen. This means it does not exhibit strong hydrogen bonding like water, resulting in its gas state at room temperature. However, dipole-dipole interactions are still important for H2S.
  • #1
mutineer
13
0
I wanted to know whether H2S is a polar compound and hence does it have a dp dp interaction. An answer sheet says the H2S only has id-id. If this is true can some one explain it to me? cause sulphur is definitively polar, and considering h2s's V shape, it should be a polar molecule, thus having dipole interaction.
 
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  • #2
Its not very polar at all. It doesn't exhibit strong hydrogen bonding like water does which is why its a gas instead of a liquid at room temperature. Take a look at the electronegativity scale:
pauling-scale.jpg

it has bent molecular geometry so you're right, it has a dipole, but as you can see sulfur and hydrogen only have an electronegativity difference of 0.38 so its not a very strong dipole. So to sum it up: H2S is only slightly polar.
 
  • #3
alright, got it! thanks
 
  • #4
Well, it has a dipole moment of 0.97 D as compared to 1.85 D of water. So it is quite polar and dipole dipole interactions are important. However, it doesn't form hydrogen bridges.
 
  • #5


Yes, hydrogen sulphide (H2S) is a polar compound. This means that it has a slightly positive and slightly negative end, known as a dipole moment, due to the unequal sharing of electrons between the hydrogen and sulphur atoms.

The V shape of H2S does contribute to its polarity, as the two hydrogen atoms are on one side of the sulphur atom, creating a slight separation of charge. This dipole moment leads to dipole-dipole interactions between H2S molecules.

It is important to note that while sulphur is a polar atom, the overall polarity of a molecule also depends on its molecular geometry and the distribution of its atoms. In the case of H2S, the dipole moment created by the V shape is strong enough to make it a polar molecule, despite the polar nature of sulphur.

Therefore, the answer sheet may be incorrect in stating that H2S only has id-id (ion-dipole) interactions. It is more accurate to say that H2S has both dipole-dipole and id-id interactions, as well as other intermolecular forces such as London dispersion forces.
 

1. Is hydrogen sulphide a polar compound?

Yes, hydrogen sulphide is a polar compound. This is because it has a dipole moment, meaning there is an unequal distribution of electrons between the hydrogen and sulphur atoms, causing a partial positive and negative charge.

2. How is the polarity of hydrogen sulphide determined?

The polarity of a compound is determined by its molecular structure and the electronegativity of its atoms. In the case of hydrogen sulphide, the difference in electronegativity between hydrogen and sulphur results in a polar covalent bond.

3. What are the properties of a polar compound like hydrogen sulphide?

Polar compounds like hydrogen sulphide have a number of properties, including being able to dissolve in polar solvents, having a boiling point and melting point, and having a dipole moment. They also tend to have higher surface tension and boiling points compared to nonpolar compounds.

4. How does the polarity of hydrogen sulphide affect its interactions with other compounds?

The polarity of hydrogen sulphide allows it to interact with other polar compounds through intermolecular forces, such as dipole-dipole interactions and hydrogen bonding. It can also interact with nonpolar compounds through weak dispersion forces.

5. What are some common uses of hydrogen sulphide?

Hydrogen sulphide is commonly used in industries such as petroleum, paper, and mining. It is also used in the production of sulfuric acid and in the synthesis of various organic compounds. Additionally, it is used as a reagent in analytical chemistry and as a reducing agent in some chemical reactions.

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