Rank the four acids from most acidic to least acidic

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Question

Rank the four acids from most acidic to least acidic 

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anonymous · Answer

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aaronq · Answer

the most acidic is the one with the most stable conjugate base

anonymous · Answer

so stronger acid = weaker browsted lowry acid? @aaronq  
so basically i just flipped everything around?

aaronq · Answer

no i never said that. i said it's conjugate base

$HCl \rightarrow H^+ + \underbrace{Cl^-}$
                  conjugate base

anonymous · Answer

then will u explain why did I get it wrong because i'm going by strongest acid to weakest acid

aaronq · Answer

the strength of an acid is dependent on the stability of the conjugate base. The more stable the conjugate base is, the stronger the acid is.

anonymous · Answer

maybe i've figured it out, cuz oH is stronger than F?

aaronq · Answer

$H_2F^+$ is the strongest acid in that list

australopithecus · Answer

Definitions

Lewis Acid: The ability to accept electrons

Lewis Base: The ability to donate electrons


Stronger acids have more electron withdrawing groups on them!

australopithecus · Answer

This goes along with what aarongq is saying which does a better job of answering your question than my answer