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Topic: conjugate acid-base pairs  (Read 4904 times)

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Offline jennielynn_1980

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conjugate acid-base pairs
« on: October 17, 2006, 03:03:34 PM »
I am having trouble trying to figure out how to write the conjugate base for the following acids that I was given.  I have tried but I have no idea if they are right.  Is there a specific way to figure it out?

a)HCl base= Cl-
b) CH4 base= CH3
c)HSO3- base = SO32-
d)H2SO4 base = HSO4-
e)NH3 base= NH2
f)HClO4 base=ClO4-

THanks :)

Offline Donaldson Tan

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Re: conjugate acid-base pairs
« Reply #1 on: October 17, 2006, 05:17:19 PM »
LOL. It is not always the case of removing H, but actually a proton.

Check your charges for (b) and (e)
« Last Edit: October 22, 2006, 10:47:54 AM by geodome »
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Offline phoebusvn

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Re: conjugate acid-base pairs
« Reply #2 on: October 17, 2006, 11:08:58 PM »
NH3 have NH4-

Offline Yggdrasil

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Re: conjugate acid-base pairs
« Reply #3 on: October 18, 2006, 01:28:04 AM »
NH2- would be the conjugate base of NH3 and NH4+ would be the conjugate acid of NH3.  NH4- does not exist.

Offline jennielynn_1980

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Re: conjugate acid-base pairs
« Reply #4 on: October 18, 2006, 11:49:33 AM »
So for b) it would be CH3- and e) would be NH2-

Going back to geodome's comment, I know I just used that one rule of taking away a hydrogen but I am not sure of how else to do it.  Does anyone have an example where the simple removal of a hydrogen is not the answer so I have something else for an example?
Also, are the answers correct? 
Thanks

Offline Yggdrasil

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Re: conjugate acid-base pairs
« Reply #5 on: October 18, 2006, 02:35:48 PM »
Geodome is just being very technical with his answer.  Removal of a hydrogen would mean removing a proton (hydrogen nucleus) and an electron to generate a radical (for example, removal of a hydrogen from HCl would generate a chlorine radical, Cl.), whereas removal of just a proton would generate the chloride ion, Cl-).

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