Weak Acids and Bases

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504909207
Posts: 30
Joined: Wed Nov 15, 2017 3:02 am

Weak Acids and Bases

Postby 504909207 » Thu Jan 24, 2019 8:00 pm

How do you know if its a weak base when you're not given the chemical equation? Is just something that we have to memorize?

Layal Suboh 1I
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Weak Acids and Bases

Postby Layal Suboh 1I » Thu Jan 24, 2019 8:17 pm

Usually, if you are given a Kb value, then you know it's a weak base. Also, there are 6 strong bases: LiOH, NaOH, KOH, Ca(OH)2, Sr(OH)2, Ba(OH)2.

LedaKnowles2E
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Weak Acids and Bases

Postby LedaKnowles2E » Thu Jan 24, 2019 8:22 pm

If the Kb value is lower than 10^-3 then it's considered a weak base, since the reaction favors the reactants. (This also applies to Ka with weak acids)

Fatemah Yacoub 1F
Posts: 114
Joined: Thu Jul 11, 2019 12:16 am

Re: Weak Acids and Bases

Postby Fatemah Yacoub 1F » Fri Nov 29, 2019 11:00 am

Since strong bases fully dissociate a helpful tip is that if Kb is given it is implying a weak base.

EmilyJoo_1G
Posts: 50
Joined: Thu Jul 25, 2019 12:16 am

Re: Weak Acids and Bases

Postby EmilyJoo_1G » Sat Nov 30, 2019 9:59 am

You'll know it's a weak base if it has a low Kb value. A Kb value below 10^-3 will indicate a low level of dissociation.

Sally Qiu 2E
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

Re: Weak Acids and Bases

Postby Sally Qiu 2E » Sat Nov 30, 2019 10:05 am

you'll know based on the kb value. i believe there are strong acids and bases you can memorize, and anything else not on that list is a weak acid/base


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