Chemical Forums

Please login or register.

Login with username, password and session length

Sponsored links

Pages: [1]   Go Down

Author Topic: What is the difference between H2S and S2-?  (Read 134 times)

0 Members and 1 Guest are viewing this topic.

GroundwaterGuy

  • Very New Member
  • *
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 0
What is the difference between H2S and S2-?
« on: February 11, 2019, 03:10:33 AM »

Hi everyone,

I am looking for some insight on Hydrogen Sulphide (H2S) and Sulphide (S2-), specifically in groundwater.

What exactly is the difference between the two?  Is hydrogen sulfide simply just a form of sulphide?  I am asking because in the provincial guidelines for groundwater (well water), there is an aesthetic objective of 0.05mg/L for sulphide (as H2S).  However, some labs that do tests on groundwater report the concentrations simply as S2-.  Can we compare this result directly to the 0.05 limit for H2S?

I would appreciate any help.

Thanks!
Logged

Babcock_Hall

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +233/-16
  • Offline Offline
  • Posts: 3603
Re: What is the difference between H2S and S2-?
« Reply #1 on: February 11, 2019, 07:02:30 AM »

If hydrogen sulfide, H2S, loses two protons, it becomes a di-anion:  S2-.  If hydrogen sulfide loses only one proton, it becomes a mono-anion: HS-.  Does this help?
Logged

Pages: [1]   Go Up
 

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.056 seconds with 23 queries.