Question

6. A lake in Upstate New York has been significantly affected by acid rain. The current pH of the lake is 5.00 and organisms in the lake have been severely impacted by elevated aluminum concentrations. Assuming that the aluminum concentrations in the water are controlled by the following reactions: Al(OH),(s) = A +30H All + OH AIOH H, OH OH Kp = 3.0 x10 -34 Ky = 2.8 x108 Kw = 1.0 x10-14 a) Find the equilibrium concentration of (Al) in the lake in umol/L). b) Find the total dissolved aluminum concentration, Alt (in umol/L) c) If the atomic weight of Al is 27.0 g/mole, what is the Alt concentration in ug/L as AI? Ans: a) 0.30 pmol/L; b) 0.38 umol/L; c) 10.4 ng/L as Al

Answer 1

Page. 여 | All 0.384 egnol L. T Here I mot - 27 g so All H 0.3848 2 7 4 g L - 10.368 kg L