Please answer all of the questions (3) and show work.

All of the questions should have all the information needed. Environmental Chemistry.

Example for reference.

= Calculate [CuY?] (report in "mM" to the third decimal place) in a sample of wastewater (pH = 12) containing a total of 15 mg of copper per litter and excess EDTA. (EDTA =Y). FMota = 372 . - K, = 6.3 * 1018 (formation constant) [EDTA] = 600 mg/L = EDTA = f1 = Type your answer... 5 points Calculate uncomplexed [Cu?*] (report in "zepto-molar" (zepto 10-21) with 3 significant figures) in a sample of wastewater (pH 12) containing a total of 15 mg of copper per litter and excess EDTA. (EDTA = Y%). .FM = 372 K,1 = 6.3 * 101 (formation constant) [EDTA] = 600 mg/L EDTA 18 f1 1 pH = 12 O + exUSS EDTA yout 3 18 - Kf1 :6.3 x 10 formunur constant) 1.61x10-3 molle xh with (u 21 Cu Y2- . problem (EDTA - YY-) [Cu 2+ | aq)] = ? [(wy 27 = ? 15 mg of copper /L FM EDTA : 372 1) at this pH =12, all EDTA is y/commentaire 2) Total [EDTA]: 600 x 10-16 [EDTA]: 600 mg/ 372 glmol 3) write ks for Cu2rty 4- [lny 2-] [y" ] [cu za ki: 6.3 x 1018 4) Ratio complex to un complexed copper : [luy 2- k. [ y 4-] : (6.3x10x (1.61*105) molle [ 14 2t = 1.01 x 1016 [Cuy 2-] > [cu 2o] practically all of the copper complex 15.4099, imo! I 2.36 x 10-4 63.54g I un complexed? [cu 2+] = [cuY2-] 2.36 x 10 ki [y":1 ot . . [lu 2] 100 : %.* mol/L tot -Y . 1.01 x 1000