What is a diprotic acid?

1 Answer
anor277
Apr 20, 2017

A diprotic acid is an acid that can formally deliver 2 equiv of hydronium ion................

Explanation:

And thus...........we can write the general equation for a diprotic acid:

#"H"_2"Y"(aq) +"2H"_2"O"(l) rightleftharpoons2"H"_3"O"^+ + "Y"^(2-)#

And some examples of diprotic acid, (i) #"sulfuric acid"#, #"H"_2"SO"_4#; (ii) #"oxalic acid"#, #"HO(O=)CC(=O)OH"#; (iii) #"sulfurous acid"#, #"H"_2"SO"_3#; (iv) #"phosphoric acid"#, #"H"_3"PO"_4#, which acts as a diacid in water.

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