A wastewater at pH 7.5 contains 45 mg/L SO4-S. (a) What fraction of the sulfate can...
A wastewater at pH 7.5 contains 45 mg/L SO4-S.
(a) What fraction of the sulfate can be reduced to sulfide without causing the partial pressure of H2S in equilibrium with the solution to exceed 10-6 atm? Assume the solution is well-buffered at pH 7.5.
(b) If the H2S partial pressure reached 10-6 atm and the solution contained 0.1 mg/L TOTZn, would you expect wurtzite [ZnS(s)] to precipitate?
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A wastewater at pH 7.5 contains 45 mg/L SO4-S.
(a) What fraction of the sulfate can...
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Clear handwriting The Zn-S-O-H20 Eh-pH diagram and the hydroxide precipitation diagram shown below from the literature...
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The Zn-S-O-H20 Eh-pH diagram and the hydroxide precipitation diagram shown below from the literature is useful in predicting leaching and precipitation reactions of sulfides and oxides/hydroxides. Answer the following questions relevant to these diagrams (a) Write the balanced chemical equations relevant to zinc leaching in solutions represented by lines 4, 5, 18 and 19 (b) Calculate the theoretical pH of a solution of 12 mol/L NaOH at 25 °C, assuming unit activity coefficients (H2O=H*+OH;; K = 1014 at...
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Clear handwriting
The Zn-S-O-H20 Eh-pH diagram and the hydroxide precipitation diagram shown below from the literature is useful in predicting leaching and precipitation reactions of sulfides and oxides/hydroxides. Answer the following questions relevant to these diagrams (a) Write the balanced chemical equations relevant to zinc leaching in solutions represented by lines 4, 5, 18 and 19 (b) Calculate the theoretical pH of a solution of 12 mol/L NaOH at 25 °C, assuming unit activity coefficients (H2O=H*+OH;; K = 1014 at...
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