The H2PO4- ion is amphoteric. What are the conjugate acid and conjugate base, in that order, of H2PO4-?
A) PO43-, H2PO4-
B) H2PO4-, PO43-
C) H2PO4-, H3PO4
D) H3PO4, HPO42-
E) H3O+, PO43-
Correct Answer:
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