Comparing Pka2 values

[discowisco]

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Which has a lower pka2 (more acidic) value H2So4 or H3PO4 and do you know?

 

[ComfortCreature]

http://www2.ucdsb.on.ca/tiss/stretton/database/polyprotic_acids.htm

Looks like the pKa of the second proton for H2SO4 has a lower value than that of the second proton in H3PO4, so that proton in H2SO4 would be more acidic. I believe I put that right.

 

[discowisco]

Lol I know its on charts but it was a question on TBR so I was wondering how one is supposed to get that intuitively

 

[goft20]

Sulfuric acid is one of the strong acids so its first and second pka will be lower (more acidic)...

 

[discowisco]

ah true. that was dumb. thanks