1.

Write conjugate base of H3PO4

Answer»

Generally, for the equation

HA = H+ + A-

HA is the acid (here H3PO4), H+ is H+ and A- is the conjugate base (H2PO4-).

H2PO4- can act as an acid, too. The equation would be:

H2PO4- = H+ + HPO4(2-)

and now HPO4(2-) is the conjugate base, but of HPO4(2-)

But, back to the original question, the conjugate base of H3PO4 is H2PO4-


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