Math

QuestionWhat is the effective buffering range for acetic acid with a pKa of 4.76?

Studdy Solution

STEP 1

Assumptions1. The pKa of acetic acid is4.76. The effective buffering range of a buffer is typically considered to be the pKa ±1 pH unit

STEP 2

The effective buffering range of a buffer is typically considered to be the pKa ±1 pH unit. Therefore, we can calculate the buffering range by subtracting1 from the pKa for the lower limit and adding1 to the pKa for the upper limit.
Bufferingrange=pKa±1Buffering\, range = pKa \pm1

STEP 3

Now, plug in the given value for the pKa of acetic acid to calculate the buffering range.
Bufferingrange=.76±1Buffering\, range =.76 \pm1

STEP 4

Calculate the lower limit of the buffering range by subtracting1 from the pKa.
Lowerlimit=4.761=3.76Lower\, limit =4.76 -1 =3.76

STEP 5

Calculate the upper limit of the buffering range by adding1 to the pKa.
Upperlimit=4.76+1=5.76Upper\, limit =4.76 +1 =5.76The effective buffering range of acetic acid is pH3.76 to5.76.

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