Acids and Bases (weak or strong)

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Melissa Villanueva1K
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Acids and Bases (weak or strong)

Postby Melissa Villanueva1K » Thu Jan 24, 2019 9:45 pm

How do we determine whether an acid or base is strong or weak? Thanks!

tierra parker 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: Acids and Bases (weak or strong)

Postby tierra parker 1J » Thu Jan 24, 2019 9:54 pm

in terms of Ka values i think for weak acids the Ka value is very small compared to that of a strong acid but i dont know if that applies for weak bases

Arman M 1A
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Re: Acids and Bases (weak or strong)

Postby Arman M 1A » Thu Jan 24, 2019 9:55 pm

You can determine whether an acid/base is strong or weak by solving for Ka and Kb. If Ka/Kb is larger than 10^-3, consider it to be strong. If it is less than 10^-3 consider it weak.

Chem_Mod
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Re: Acids and Bases (weak or strong)

Postby Chem_Mod » Thu Jan 24, 2019 9:59 pm

It is more convenient to remember all the strong ones and the rest will be weak. See the following for strong acids and strong bases.
HI HBr HClO4 HCl HClO3 H2SO4 HNO3
NaOH KOH LiOH RbOH CsOH Ca(OH)2 Ba(OH)2 Sr(OH)2


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