Problem: What is the conjugate base of H2PO4–(aq)?A) HPO4–B) H3O+C) HPO42−D) H2PO4E) H3PO4

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We’re being asked to determine the conjugate base of H2PO4–.


Recall that the conjugate base of an acid is simply the compound formed when an acid loses a hydronium ion (H+). It's considered as a base because it can gain H+ to reform the acid.


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Problem Details

What is the conjugate base of H2PO4–(aq)?

A) HPO4–

B) H3O+

C) HPO42−

D) H2PO4

E) H3PO4

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