Hydrogen Sulfide and Hydrosulfuric Acid

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Discussion Overview

The discussion revolves around the classification of Hydrogen Sulfide (H2S) and Hydrosulfuric Acid, particularly whether both can be considered acids. Participants explore definitions, semantics, and chemical reactions involving these substances.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants assert that an acid is defined as a molecular compound that releases hydrogen ions when dissolved in water, questioning if H2S and Hydrosulfuric Acid fit this definition.
  • Others argue that the definition of an acid is not clear-cut, as it does not specify how to classify a substance that will release H+ when placed in water but is not currently in solution.
  • One participant claims that H2S and Hydrosulfuric Acid are the same substance, differing only in nomenclature based on their state (gaseous vs. aqueous).
  • Another participant draws a parallel to Hydrogen Chloride gas, suggesting that it too is only considered an acid when in aqueous form.
  • A participant asks for confirmation on whether H2S reacts with a base to form a salt and water, to which another participant confirms this reaction occurs.
  • Specific reactions involving H2S and bases, such as Ca(OH)n and NaOH, are proposed, although there are formatting issues in the equations presented.
  • There is a discussion about the use of symbols in chemical equations, with some participants noting local conventions and potential confusion regarding the notation used.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the classification of H2S and Hydrosulfuric Acid as acids. There are multiple competing views regarding definitions and nomenclature, as well as differing opinions on the chemical reactions involving H2S.

Contextual Notes

The discussion highlights limitations in the definitions of acids and the conditions under which substances are classified as such. There are unresolved issues regarding the notation and formatting of chemical equations.

chuckset
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In our chemistry class, we learned that an acid is a molecular compound that release hydrogen ions when they are dissolved in water through a process called ionization. So are both Hydrogen Sulfide (g) and Hydrosulfuric Acid (aq) acids?
 
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If you ask me - that's a nitpicky question that doesn't have a definitive answer.

Definition is not clear, as it doesn't specify how to treat potential acid - substance that WILL release H+ WHEN put in water, but it is not yet in water. You can argue that it is an acid (it will when) and that it is not an acid (it is not in water and it is not releasing H+). So it is semantics.

Could be my English fails me. Second opinion won't hurt.

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They are the same substance...

It's just that H2S is called Hydrosulfuric Acid when aqueous solution, and Hydrogen Sulfide otherwise.
 
Its the same concept as Hydrogen Chloride gas. It could be an acid if it was aqueous.
 
my friend please confirm from teacher that if H2S reacts with a base it forms a salt and water or not
 
Yes, it does.
 
Specifically, for a base Ca(OH)n, where Ca is any cation, the reaction proceeds as follows:

n H2S + 2 Ca(OH)n --> 2n H2O + Ca2Sn

I believe. So for NaOH it would be...

2 NaOH + H2S --> 2 H2O + Na2S
 
Last edited:
Ca is a poor idea for any cation symbol, Me is much better.

Formatting in your second equation went awry.
 
Me looks like methyl; M is generally used
 
  • #10
Fixed the format, and yeah, I should have done M.
 
  • #11
Cesium said:
Me looks like methyl; M is generally used

Must be a matter of local convention, I am more than sure that I have books with Me in this room. But no doubts that you are right about possible confusion.

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methods
 

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