Derive the henders on- hasselbalch equation for the acid ioniza tion of a weak acid ha and use this equation to construct a concentration ph profile for the essential amino acid phenyla lanine, the structure of which is given below. the following are relevant pka and pi values: pkaj 2.58; pka 9.24; pi 5.48. in all cases clearly identify and label the structures involved in each acid ioniza tion step. (12 ma versus

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.