Select all statements that state the purpose of an auxiliary complexing agent and example of its use.a) A completing agent forms a weak complex with analyte ion, thereby keeping it in solution without interfering with EDTA titration.b) NH3 keeps Zn2+ in solution at high pH, but is easily displaced by EDTA.c) A completing agent forms a strong complex with analyte ion, thereby keeping it in solution without interfering with EDTA titration.d) NH3 keeps Zn2+ in solution at high pH, but is not displaced by EDTA.

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Asked Nov 11, 2019
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Select all statements that state the purpose of an auxiliary complexing agent and example of its use.

a) A completing agent forms a weak complex with analyte ion, thereby keeping it in solution without interfering with EDTA titration.
b) NH3 keeps Zn2+ in solution at high pH, but is easily displaced by EDTA.
c) A completing agent forms a strong complex with analyte ion, thereby keeping it in solution without interfering with EDTA titration.
d) NH3 keeps Zn2+ in solution at high pH, but is not displaced by EDTA.
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Auxiliary complexing agent:

  1. In an EDTA titration an auxiliary complexing agent is added to prevent OH- ion formation....

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