A solution containing 0.139 mmol of the triprotic acid tris(2-aminoethyl)amine 3HCl plus 0.115 mmol HCl in
Question:
(a)Write expressions for the experimental mean fraction of protonation,H(measured), and the theoretical mean fraction of protonation, H(theoretical).
b) From the following data, prepare a graph of H(measured) versus pH. Find the best values of pK1, pK2, pK3, and pKw by minimizing the sum of the squares of the residuals,∑[ H(theoretical)]2
Create a fractional composition graph showing the fractions of H3A3+, H2A2+, HA+, and A as a function of pH.
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Step by Step Answer:
b moles of bound H total moles of weak acid 3H3A31 2HA2 HA H3A3 HA2 HA A or HFH3A 3H3A 2HA2 HA where FH3A H3A3 HA2 HA A Charge balance H Na 3H3A3 2HA2 ...View the full answer
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