Answer
a) $RCOO^-$
b) $RNH_{2}$
c) $H_{2}PO_{4}$
d) $HCO^{-}_{3}$
Work Step by Step
A conjugate base is what remains after an acid has been deprotonated.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.