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In order to answer these questions you must remember that a conjugate acid gains a proton (H+) and a conjugate base looses a proton. Question: What is the conjugate base in this equation: S₂⁻ base + H₂O acid --> OH⁻ conjugate base + HS⁻ conjugate acid In this equation, S₂⁻ gains a proton and forms HS⁻. This means that S₂⁻ is the base and HS⁻ is the conjugate acid. In addition, H₂O looses a proton and forms HS⁻. This means that in this equation, H₂O is the acid and HS⁻ is the conjugate base. |
Key:
Acid - Proton donor Base - Proton receiver |