EDTA abstracts bismuth(III) from its thiourea complex: Bi1tu26 31 1 H2Y22 S BiY2 1 6tu 1 2H1 where tu is the thiourea molecule (NH2)2CS. Predict the shape of a photometric titration curve based on this process, given that the Bi(III) or thiourea complex is the only species in the system that absorbs light at 465 nm, the wavelength selected for the analysis.

Question

EDTA abstracts bismuth(III) from its thiourea complex:
Bi1tu26
31 1 H2Y22 S BiY2 1 6tu 1 2H1
where tu is the thiourea molecule (NH2)2CS. Predict the shape of a photometric titration curve based on this
process, given that the Bi(III) or thiourea complex is the only species in the system that absorbs light at 465
nm, the wavelength selected for the analysis.

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