Question: EDTA is used as a complex agent in chemical analysis. Solutions of EDTA, usually containing the disodium salt Na 2 H 2 EDTA, are also

EDTA is used as a complex agent in chemical analysis. Solutions of EDTA, usually containing the disodium salt Na₂H₂EDTA, are also used to treat heavy metal poisoning. The equilibrium constant for the following reaction is 6.7 × 10^-1: Pb+ (aq) + HEDTA (aq) PbEDTA (aq) + 2H+ (aq) 0C-CH CH,CO,

Pb+ (aq) + HEDTA (aq) PbEDTA (aq) + 2H+ (aq) 0C-CH CH,CO, CH,CO2 EDTA = OC-CH = N-CH-CH-N Ethylenediaminetetraacetate

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