Question

What is the formula for hydrosulfuric acid?

Answer 1

Hint: Hydrosulfuric acid is another name for a very well known compound i.e., hydrogen sulphide whose chemical formula is ${{H}_{2}}S$. Also the structure of ${{H}_{2}}S$ is almost similar to that of ${{H}_{2}}O$.

Complete answer: Hydrosulfuric acid (also known as hydrogen sulfide or sulfane) exists in the form of a colorless gas and has a rotten egg smell. This gas is known for being flammable, corrosive and toxic in nature.
- To solve this question we must know about binary acids as well. A binary acid is a chemical compound where we will generally find one element to be hydrogen (H) and the other element to be a non-metal. These acids are also known as hydracids. All binary acids have similar nomenclature:-
‘Hydro’ is used as a prefix
After ‘hydro’ comes the anionic part which will be a non metal
‘ic’ is used as a suffix
At last, the ‘acid’ is used as the second word.
-According to this nomenclature rule the chemical formula of hydrosulfuric acid will be ${{H}_{2}}S$(as hydro means ‘H’ and sulphur means ‘S’. 2 atoms of hydrogen are involved so as to satisfy the valency and octet of sulfur.
-The structure of hydrosulfuric acid (${{H}_{2}}S$) is just similar to water (${{H}_{2}}O$).

Additional Information: -Hydrosulfuric acid in the production of sulfuric acid and elemental sulfur.
-It is also used in leather, dyes, pesticides and pharmaceuticals and also as agricultural disinfectant.
-${{H}_{2}}S$ is used for the production of heavy water in nuclear power plants.

Note: Remember that sulfur is not as electronegative as oxygen atom. Therefore ${{H}_{2}}S$ is not as polar as ${{H}_{2}}O$ due to which relatively weaker intermolecular forces exist in ${{H}_{2}}S$ and the melting and boiling point are way lower compared to water.