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# Conjugate Base

APCHEM-SJYX7U

Which of the following is the conjugate base in this reaction?

$$H_2S_{(g)}+ H_2O_{(l)} \rightleftharpoons H_3O^+ \ _{(aq)}+ HS^- \ _{(aq)}$$

A

$H_2S$

B

$H_2O$

C

$H_3O^+$

D

$HS^–$