How can I tell when asked to provide a conjugate base for S2- or a conjugate aci
ID: 1014118 • Letter: H
Question
How can I tell when asked to provide a conjugate base for S2- or a conjugate acid for CH3NH3+ if it just does not have one. For S ^2- seems simple, for the second one, I guess just because N can not accept more H? Are there general rules go this or do I need to look at the structure? How can I tell when asked to provide a conjugate base for S2- or a conjugate acid for CH3NH3+ if it just does not have one. For S ^2- seems simple, for the second one, I guess just because N can not accept more H? Are there general rules go this or do I need to look at the structure?Explanation / Answer
Conjugate acid - base pair is differed by only single rpoton.
conjugate acid is having one proton more than its conjugate base.
Similarly conjugate base is having one proton less than its conjugate acid.
Simpley remove a proton to get conjugate base and add a proton to get conjugate acid of any species.
In the present problem,
Since it not possible to remove a proton (H+ ion) from S2-, it does not have its conjugate base.
Similarly, CH3NH3+ can not accept a proton (H+ ion), it does not have it conjugate acid.
So, there are no particular rules, we just expain based on the structures only.
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