1. The attached figure shows a diagram of the predominance of the different protonated forms of EDTA as a function of pH. In the face of the formation of a complex of the MY type between an M metal and EDTA, say what is the most correct answer among the following: Select one: a. it is interesting that the pH is low because it is at least Y4- there is and therefore more complex there will be b. The pH value of the solution is indifferent, what matters is the value of the formation constant, Kf c. it is interesting that the pH is high because it is when there is more Y4- and, therefore, more complex d. A pH between 9 and 12 is interesting because then part of the EDTA is protonated and part is free. 2.At pH 5 the predominant form of EDTA is: 3. At what pH is the alpha4 value 0.50?
1. The attached figure shows a diagram of the predominance of the different protonated forms of EDTA as a function of pH. In the face of the formation of a complex of the MY type between an M metal and EDTA, say what is the most correct answer among the following:
Select one:
a. it is interesting that the pH is low because it is at least Y4- there is and therefore more complex there will be
b. The pH value of the solution is indifferent, what matters is the value of the formation constant, Kf
c. it is interesting that the pH is high because it is when there is more Y4- and, therefore, more complex
d. A pH between 9 and 12 is interesting because then part of the EDTA is protonated and part is free.
2.At pH 5 the predominant form of EDTA is:
3. At what pH is the alpha4 value 0.50?
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