Question

In the two step ionization process of H2CO3, which step releases the most hydronium ions into the solution?

H2CO3 (aq) + H2O (l) <----> HCO3- (aq) + H3O+ (aq)

HCO3- (aq) + H2O (l) <----> CO32- (aq) + H3O+ (aq)

Answer 1

the second one ..
consider the ionizations.
the first equation gives ions with single charge
the second equation gives a doubly charged carbonate ion and hence "2" hydronium ions to balance that.

Answer 2

Ah, thank you, that makes a lot of sense!

Answer 3

yw