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Which of the following aqueous solutions will or will not act as a buffer solution? 

H2SO3 and NaHSO3 
 HBr and KI 
 HClO4 and NaClO4 
 CH3CO2K and CH3CO2Na 
NaOH and NaCl 

NaH2PO4 and Na2HPO4 

Feb 22nd, 2015

OK, so a buffer soln requires a few things:

1. You need a weak acid, (or base)

2. You need to have the conjugate base of that acide present from a salt


Instantly, 

HBR/KI

HClO4/NaClO4

and NaOH/NaCl

..all violate requirement 1 so they can't act as buffers.


The others would act as buffers to varying degrees.



Feb 22nd, 2015

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Feb 22nd, 2015
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Feb 22nd, 2015
Jun 24th, 2017
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