what buffer component ratio base/acid would be needed to make a pH 11.75 buffer using a mixture C5H10NH2
Required pH of buffer is 11.75
Given component is C5H10NH2+.
The given component is a conjugated acid for C5H10NH . So, in order to make a buffer a weak base C5H10NH is to be mixed with C5H10NH2+.
The weak base will be C5H10NH.
pH of a buffer is given Hassel Bach - Henderson's equation as follows:
we know that, pH+pOH =14
pOH=14-11.75
pOH=2.25
So, for a weak base the pOH of a buffer is given by:
Dissociation constant of weak base (C5H10NH) is = 1.3 x 10-3
pKb is given by:
Now substituting the values in Hassel Bach - Henderson's equation :
Therefore, the buffer component ratio for Base/Acid needed to make a pH of 11.75 is 4.325
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