2. From the structure of EDTA (and knowing that it is ethylene diamine tetraacetic acid) explain why the EDTA is much more soluble after the addition of the basic ammonia buffer. Is there a chemical reaction that is responsible for this solubility change? If so explain what the reaction is and how it would be responsible for the increased solubility of EDTA in water.

2. From the structure of EDTA (and knowing that it is ethylene diamine tetraacetic acid) explain why the EDTA is much more soluble after the addition of the basic ammonia buffer. Is there a chemical reaction that is responsible for this solubility change? If so explain what the reaction is and how it would be responsible for the increased solubility of EDTA in water.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.34QAP

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17. Which of the following statements is not true? (a) EDTA is a hexaprotic acid containing four carboxyl protons and two ammonium protons. (b) EDTA forms 1:1 complexes with most metal ions. (c) The concentration of a free metal ion can be determined through titration with EDTA. (d) If the pH of a metal-EDTA complex solution is fixed by a buffer, the conditional formation constant (K,) can be determined. (e) The formation constant, K, for an EDTA complex is typically a small value.
From the structure of EDTA (and knowing that it is ethylene diamine tetraacetic acid) explain why the EDTA ismuch more soluble after the addition of the basic ammonia buffer. Is there a chemical reaction that isresponsible for this solubility change? If so explain what the reaction is and how it would be responsiblefor the increased solubility of EDTA in water.
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