# The pKa of the a-carboxyl group of methionine is 2.28, and the pKa of its a-amino group is 9.21. Calculate the average netcharge on methionine if it is in a solution that has a pH of 8.50average net charge on methionine:

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How is this question begun?  How is the HH equation used? help_outlineImage TranscriptioncloseThe pKa of the a-carboxyl group of methionine is 2.28, and the pKa of its a-amino group is 9.21. Calculate the average net charge on methionine if it is in a solution that has a pH of 8.50 average net charge on methionine: fullscreen
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Step 1

The Henderson-Hasselbalch equation is as follows

Step 2

On reaaranging the equation, we get the following equation

Step 3

Now when we calculate the charge on methionine... help_outlineImage TranscriptioncloseΣοΣο 1 10Pa1pH +1 10P2-pH 1 1 1 8.50-9.21 +1 102.88-9.21 1 1 11022 1+10-0.71 fullscreen

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