TBR Acids and Bases Example 4.12

[capnamerica]

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I don't understand why we multiply the molarity of H2SO4 by 2 since only the first proton is highly acidic. Is it because as the base neutralizes the initial amount of H+, this creates a gradient causing more of the HSO4- to lose the remaining proton? Please help!

 

[Rabolisk]

Without knowing the question, I would have to say that to fully neutralize H2SO4, you have to use twice the mole of base, even though the second proton is only weakly acidic. This is no different from a case of neutralizing a weak acid. To neutralize 1 mole of weak acid HA, you have to have 1 mole of base, regardless of the acid strength.

I think I answered your question, but I was just guessing since I don't know what the question is.

 

[capnamerica]

Yeah, you did. Thanks!!