Ka*Kb=Kw

Acidity
Basicity
The Conjugate Seesaw

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ayushibanerjee06
Posts: 177
Joined: Thu Jul 11, 2019 12:16 am
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Ka*Kb=Kw

Postby ayushibanerjee06 » Tue Jan 21, 2020 11:46 am

For the Ka*Kb=Kw equation, does it make a difference if we say Kw=10^-4 or 1.0*10^-4?

JasonLiu_2J
Posts: 109
Joined: Sat Aug 24, 2019 12:17 am

Re: Ka*Kb=Kw

Postby JasonLiu_2J » Tue Jan 21, 2020 11:50 am

It does not make a difference for calculations since 10^-14 and 1.0 x 10^-14 are the same thing but you should note that 1.0 x 10^-14 gives you two sig figs which would be useful to have the correct number of sig figs in your answer.

RRahimtoola1I
Posts: 102
Joined: Fri Aug 09, 2019 12:15 am

Re: Ka*Kb=Kw

Postby RRahimtoola1I » Sat Jan 25, 2020 12:29 pm

Make sure you are using -14 not -4!

Jamie Lee 1F
Posts: 106
Joined: Fri Aug 09, 2019 12:16 am

Re: Ka*Kb=Kw

Postby Jamie Lee 1F » Sat Jan 25, 2020 5:10 pm

No, in calculation you should get the same thing since 1 times anything is still that value. Just make sure to keep sig. figs. in mind.

Diana Chavez-Carrillo 2L
Posts: 122
Joined: Fri Sep 28, 2018 12:18 am

Re: Ka*Kb=Kw

Postby Diana Chavez-Carrillo 2L » Sat Jan 25, 2020 5:52 pm

Kw= 10^-14 and Kw= 1.0 * 10 ^-14 are the same but I believe in the book they used 1.0 * 10 ^-14 because it helps keeping up with the sig figs. But remember that Kw=10 ^-14 ONLY at 25 degrees Celsius.

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Ka*Kb=Kw

Postby Bryce Barbee » Sat Jan 25, 2020 6:01 pm

Both mean the same thing so it does not matter which one that you use.


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