Weak acids vs. weak bases

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Ann Pham
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Joined: Fri Sep 25, 2015 3:00 am

Weak acids vs. weak bases

Postby Ann Pham » Fri Nov 13, 2015 10:05 pm

If the common theme to identify weak bases is the presence of a nitrogen with a lone pair, is there a common theme to identify weak acids? Or is memorizing the strong bases/acids more effective?

Chem_Mod
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Re: Weak acids vs. weak bases

Postby Chem_Mod » Sat Nov 14, 2015 2:30 am

This is not a universal common theme, there exist compounds with nitrogen lone pairs that are very strong bases. For this class you should memorize the list of seven strong acids:

HCl, HBr, HI
HClO3, HClO4
HNO3
H2SO4

Every hydroxide of a Group 1 or Group 2 metal is a strong base: eg. NaOH, KOH, Sr(OH)2, etc

Any acid/base not mentioned here can be safely assumed to be weak. The conjugate of a strong acid is a weak base and vice versa. The conjugate of a weak acid is a strong base and vice versa.


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