Chemistry, 16.07.2019 04:20 gobbler80

(edta4-) is used as a complexing agent in chemical analysis. solutions of edta4- are used to treat heavy metal poisoning by removing the heavy metal in the form of a soluble complex ion. the complex [pb(edta]2- has kf = 1.1 x 1018.
a. calculate the concentration of pb2+ in a saturated solution of pb(oh)2, ksp = 1.2 x 10-15.
b. calculate the concentration of pb2+ in a saturated solution of pb(oh)2 buffered at ph 13.00
c. calculate the concentration of pb2+ in a 1.0 l solution containing 0.050 m na4edta with 0.010 mole pb(no3)2 added (assume negligible volume change due to addition of this solid).
d. consider a solution with 0.010 mole pb(no3)2 added to 1.0 l of an aqueous solution buffered at ph = 13.00 and also containing 0.050 m na4edta. does pb(oh)2 precipitate from this solution?

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