Question

The hydrogen sulphide ion, HS-, is able to both gain and lose protons when it reacts with water. Write the equations for these two reactions

Answer 1

HS- + H+ --? H2S
HS --> H+ + S2-

Answer 2

or:
HS- (aq) + H2O (l) --> H2S + OH- (aq)
HS- (aq) + H2O (l) --> S2- + H3O+ (aq)

Answer 3

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