Dale S. answered 04/22/20
Passionate in student success in chem and physics!
Protic means how many hydrogen atoms the compound could donate in a chemical reaction.
H3PO4 has 3 H atoms and would be classified as triprotic.
For reference HCl is classified as monoprotic, having only 1 H atom to donate and H2CO3 is diprotic.
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Dale S.