Question

< Question 5 of 5 > Calculate pFe2+ at each of the points in the titration of 27.15 mL of 0.0346 MEDTA with 0.0173 M FeCl. The EDTA solution is buffered at a pH of 10.00. The fraction of free EDTA in the Y4- form (Qy) can be found in this table. The formation constant for the Fe2+ -EDTA complex is given by log Kf = 14.30. 5.430 mL pFe2+ = 21.72 mL pFe2+ = 43.44 mL pFe2+ = 53.21 mL pFe2+ = 54.19 mL pFe2+ = 54.30 mL pFe2+ = 54.41 mL pFe2+ = 59.73 mL pFe2+ = 65.16 mL pFe2+ = about us Careers privacy policy terms of use contact us help

Answer 1

a PM 10 44- 28.37. Feta tx4 text (complex) Kez Crex 2-) (Fetz) [y4] Xq' kx 4,4 ? [fex2) (fet2) Costa Kalz 1014300837 a 7.4x1013 Calculate Equralence point volume of Peth firstt mmoles GOTA 2 mmoles Feth added. 0.0346 m x 27.15 ml 2 0.0173m x Feth Feth 2 54-3 me 5.430ml + before equivalence poiNE so all added Fet2 is converted to complex and excess edra present. C complex) a 2 0 moles et Total volume -0173 mx 5-430 me s-boml + 27-15 me VAL Yasra 2 To.00288 m.) CEDTA) ieft moles EDTARCH, Total mnoles - immoles reach Total volume total volume 0.0346MY 27-15ml - 0.0173 mx S-400 5- 40mL +27-15 ml Total mmeles GOTA 2 Toat mnole ret? Car equivalente mmores FOTA reach Immaes Teth ackled 0.0173m (54-30 me -5-430 ml) 5.430 mL +27 15ml 0.260 M

of complex calcolse (Roth) from dissociation rett & X4- 2 sex? 1 O 0-0260 0-00288 c tx tx Gx0 -0260 + 8 6 -00288 x (reglect & the KE 2 (complex] [fet2) Ceara 7.4810'3 2 0.00288 of x x 0-0260 less 2) [fet27 zx2 1.5 x 16 2) pret2 a 10g (1-5x1074] 14-82] 2 tog (reth 21.72 ml, 3-44 ml, 33- 21 ml, 54-19 ml all eauvalence point so cakulate same as are before above 34 30ml So all equivalence GOTA convert point. to complex kolą Ccomplex) 2 mmoles EDTA s nmoles te added Total volume 2 0 -0173m x 54-30ml [2715 + 54-300 ml o ol15 m KEI 2 (complex) (reth) Cedra 2.4x 103 2 0.0115m x & Crete) a cesta 2 x 10m - pret (7.92) (2 decinal places) x2

84-41 mit after equivalence point , Feth is in Total mmoles – mnoles react excess Cret22 Total volume 2 0.0173m (54.41 m. – 54-30 mi) 27.15mL +54-41ml 2 0.0000233m a 2.3x 10 m. pretz z log CFetz) 2 -log Co-00 0023 a) 2 4.64. 89.73ml t [r-et2) 2 0.0173m (59.73 mL - 54-30 mL] 27.15 mL & 54-73 mL o.oo los m - preta a log Co-00108) 22.967 (3 decimal ) Places