The equation below shows the proton transfer reaction between methylamine and the hydrogen sulfate ion in aqueous solution:
CH3NH2(aq)+HSO4−(aq)⇌CH3NH3+(aq)+SO42−(aq) \text{CH}_3\text{NH}_2(\text{aq}) + \text{HSO}_4^-(\text{aq}) \rightleftharpoons \text{CH}_3\text{NH}_3^+(\text{aq}) + \text{SO}_4^{2-}(\text{aq}) CH3NH2(aq)+HSO4−(aq)⇌CH3NH3+(aq)+SO42−(aq)Which of the following represents a conjugate acid-base pair in this reaction?
CH3NH2\text{CH}_3\text{NH}_2CH3NH2 and HSO4−\text{HSO}_4^-HSO4−
HSO4−\text{HSO}_4^-HSO4− and CH3NH3+\text{CH}_3\text{NH}_3^+CH3NH3+
CH3NH2\text{CH}_3\text{NH}_2CH3NH2 and CH3NH3+\text{CH}_3\text{NH}_3^+CH3NH3+
SO42−\text{SO}_4^{2-}SO42− and CH3NH3+\text{CH}_3\text{NH}_3^+CH3NH3+