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pka -ph problem

floridianfis
in Biochemistry and Molecular Biology

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I am having trouble finding out how to get 10.22 ofr the answere to the following question. Can anyone help?

 

A solution of Valine is obsevered to have its amino group partially deprotonated. 25 % is of the form R-NH3+, and 75% is of the form R-NH2. Assume that Valine has the following pKa values: 2.29 and 9.74. What is the pH of this solution?

  • 1 month later...

remember, in a certain area whe pka > pH, you will have the NH3+

where pka < pH, you will only have the two nitrogens.

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