why is dilute nitric acid not used in manufacture of hydrogen sulphide instead of dilute sulphuric acid?
Hydrogen Sulfide manufactured? Here, in my area, H2S is "sour gas", which occurs in natural gas, and it has to be separated from the natural gas. The H2S is then used to make sulfuric acid.
I am not certain what you are asking.
but i am talking about laboratory preparation of hydrogen sulphide gas. it is prepared by treating ferrous sulphide with dilute sulphuric acid.but i want to know what happens when we use nitric acid instead of sulphuric acid.hope u will answer my question.
Dilute nitric acid is not commonly used in the manufacture of hydrogen sulfide due to several reasons. The main reason is that nitric acid is an oxidizing agent, meaning it has a tendency to accept electrons from other substances. This property makes it less suitable for generating hydrogen sulfide gas.
When dilute sulfuric acid reacts with a metal sulfide, such as iron(II) sulfide (FeS), it displaces the sulfur from the sulfide, resulting in the formation of hydrogen sulfide gas (H2S). The reaction can be represented as follows:
FeS + H2SO4 → FeSO4 + H2S
In this reaction, the sulfuric acid donates its hydrogen ions (H+) to the iron(II) sulfide, which results in the formation of iron(II) sulfate and hydrogen sulfide.
On the other hand, if dilute nitric acid were to be used instead of sulfuric acid in the reaction, the nitric acid would act as an oxidizing agent. It would react with the sulfide ion (S2-) to form elemental sulfur (S). The reaction can be represented as follows:
FeS + 2HNO3 → Fe(NO3)2 + S + H2O
As you can see, the nitric acid oxidizes the sulfur, leading to the formation of elemental sulfur rather than hydrogen sulfide gas. This is not desirable in the manufacture of hydrogen sulfide.
Therefore, dilute sulfuric acid is the preferred acid for the production of hydrogen sulfide because it does not interfere with the desired formation of hydrogen sulfide gas and allows for the efficient generation of the gas.