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Weak and Strong Acids/Bases

Posted: Sun Dec 02, 2018 2:51 pm
by Victoria Luu - 1C
How do you determine if an acid or base is strong or weak? Is it based off the lewis structure? or the reaction equation?

Re: Weak and Strong Acids/Bases

Posted: Sun Dec 02, 2018 3:23 pm
by jessicahe4Elavelle
For the acids, there are in total 7 strong acids that you should just memorize: HCl, HBr, HI, HNO3, HClO3, HClO4, H2SO4. (so the rest would be weak acids). The strong bases, instead you can recognize them as they are always a metal hydroxide (e.g. LiOH, NaOH, KOH...).

Re: Weak and Strong Acids/Bases

Posted: Sun Dec 02, 2018 4:31 pm
by Soyoung Park 1H
Do we have to memorize all the 7 strong acids for the coming up final?

Re: Weak and Strong Acids/Bases

Posted: Sun Dec 02, 2018 4:46 pm
by Jordan Y4D
Soyoung Park 1H wrote:Do we have to memorize all the 7 strong acids for the coming up final?

It wouldn't be a bad idea, especially since it is not too difficult to know them by their names. I would guess that we will be given the molecular formulas of any substance we are given on the final, but I could be wrong.

Re: Weak and Strong Acids/Bases

Posted: Sun Dec 02, 2018 7:00 pm
by sameeksha_panda_3h
jessicahe4Elavelle wrote:For the acids, there are in total 7 strong acids that you should just memorize: HCl, HBr, HI, HNO3, HClO3, HClO4, H2SO4. (so the rest would be weak acids). The strong bases, instead you can recognize them as they are always a metal hydroxide (e.g. LiOH, NaOH, KOH...).


For the metal hydroxides (strong bases) is it just row one and two metals or does it include transition metals, etc. as well?

Re: Weak and Strong Acids/Bases

Posted: Sun Dec 02, 2018 7:05 pm
by ryanhon2H
sameeksha_panda_3h wrote:
jessicahe4Elavelle wrote:For the acids, there are in total 7 strong acids that you should just memorize: HCl, HBr, HI, HNO3, HClO3, HClO4, H2SO4. (so the rest would be weak acids). The strong bases, instead you can recognize them as they are always a metal hydroxide (e.g. LiOH, NaOH, KOH...).


For the metal hydroxides (strong bases) is it just row one and two metals or does it include transition metals, etc. as well?


Transition metals make weak bases usually. I would say that just row one and two metals form strong bases.

Re: Weak and Strong Acids/Bases

Posted: Wed Dec 05, 2018 2:40 pm
by Chem_Mod
Correction to the above posts: Column 1 and 2, not rows 1/2, make strong bases.

Re: Weak and Strong Acids/Bases

Posted: Wed Dec 05, 2018 6:44 pm
by ThomascnguyenDis1J
What makes the weak acids/bases weak and the strong acids/bases strong?