The conjugate base for H3PO4 is derived by removing one hydrogen ion (H+) from H3PO4.
Therefore, the formula of the conjugate base for H3PO4 is H2PO4-.
H3PO4 is a polyprotic acid that can lose up to three protons. When it loses one proton, it forms the conjugate base, which is called H2PO4- (dihydrogen phosphate ion). Therefore, the formula of the conjugate base for H3PO4 is H2PO4-.
To determine the formula of the conjugate base for H3PO4 (phosphoric acid), you need to remove one hydrogen ion (H+) from the acid formula. Since H3PO4 has three hydrogen ions, removing one results in the formula H2PO4- (di-hydrogen phosphate ion).