Bisulfide

Apr 23, 2026 - 20:00
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Bisulfide

Chemical reactions: qualitative inorganic analysis.

← Previous revision Revision as of 14:29, 23 April 2026
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{{NumBlk|:|{{chem2|HS- + H2O}} {{EqmL}} {{H2S}} + {{OH-}}|{{EquationRef|2}}}}
{{NumBlk|:|{{chem2|HS- + H2O}} {{EqmL}} {{H2S}} + {{OH-}}|{{EquationRef|2}}}}


=== Chemical reactions ===
=== Reactions ===
Upon treatment with an acid, bisulfide converts to [[hydrogen sulfide]]. With strong acids, it can be doubly protonated to give {{Chem|H|3|S|+}}. Oxidation of bisulfide gives sulfate. When strongly heated, bisulfide salts decompose to produce [[sulfide]] salts and hydrogen sulfide.
Upon treatment with an acid, bisulfide converts to [[hydrogen sulfide]]. Oxidation of bisulfide gives polysulfide and eventually [[sulfate]]. When anstrongly heated, alkali bisulfide salts decompose to produce [[sulfide]] salts and hydrogen sulfide.
{{chem2|2NaHS → H2S + Na2S}}
{{NumBlk|:|2 HS− → {{H2S}} + S2−|{{EquationRef|3}}}}


When treated with metal salts, bisulfide gives the corresponding sulfide:
⚫
SH− is a [[HSAB theory|soft]] anionic [[ligand]] that forms [[Transition metal complexes of hydrogen sulfide and hydrosulfide|complexes]] with most metal ions. Examples include [Au(SH)2]− and (C5H5)2Ti(SH)2, derived from [[gold(I) chloride]] and [[titanocene dichloride]], respectively.{{Citation |author1=Peruzzini, M. |author2=de los Rios, I. |author3=Romerosa, A. |name-list-style=amp | title = Coordination Chemistry of Transition Metals with Hydrogen Chalcogenide and Hydrogen Chalcogenido Ligands | journal = Progress in Inorganic Chemistry | volume = 49 | pages = 169–543 | year = 2001 | doi =10.1002/9780470166512.ch3 | isbn = 978-0-470-16651-2 }}
:{{chem2|2NaHS + M(2+)→ MS + 2 Na+}} (M = Ni(II), Pb(II), Cd(II), etc)

This conversion is the basis of some schemes in [[qualitative inorganic analysis]].

⚫
Under specific conditions, SH− forms [[Transition metal complexes of hydrogen sulfide and hydrosulfide|complexes]] with most metal ions. Examples include [Au(SH)2]− and (C5H5)2Ti(SH)2, derived from [[gold(I) chloride]] and [[titanocene dichloride]], respectively.{{Citation |author1=Peruzzini, M. |author2=de los Rios, I. |author3=Romerosa, A. |name-list-style=amp | title = Coordination Chemistry of Transition Metals with Hydrogen Chalcogenide and Hydrogen Chalcogenido Ligands | journal = Progress in Inorganic Chemistry | volume = 49 | pages = 169–543 | year = 2001 | doi =10.1002/9780470166512.ch3 | isbn = 978-0-470-16651-2 }}


== Safety ==
== Safety ==
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