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Cadmium is a pollutant of concern in mining. The initial concentration of cadmium in a mining wastewater (also called acid mine drainage) is 0.1 mg/L, and the EPA Maximum Contaminant Level (MCL) is 0.005 mg/L. What must the pH be so that the wastewater does not exceed the EPA MCL? Given: Cd(OH)2 → Cď²+ + OH (unbalanced) K, = 5.33 x 1015 Cd(OH)2 = 146.4 g/mol Cd2+ = 112.4 g/mol OH- = 17.0 g/mol

Cadmium is a pollutant of concern in mining. The initial concentration of cadmium in a mining wastewater (also called acid mine drainage) is 0.1 mg/L, and the EPA Maximum Contaminant Level (MCL) is 0.005 mg/L. What must the pH be so that the wastewater does not exceed the EPA MCL? Given: Cd(OH)2 → Cď²+ + OH (unbalanced) K, = 5.33 x 1015 Cd(OH)2 = 146.4 g/mol Cd2+ = 112.4 g/mol OH- = 17.0 g/mol

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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2. Cadmium is a pollutant of concern in mining. The initial concentration of cadmium in a mining wastewater (also called acid mine drainage) is 0.1 mg/L, and the EPA Maximum Contaminant Level (MCL) is 0.005 mg/L. What must the pH be so that the wastewater does not exceed the EPA MCL? Given: Cd(OH)2 → Cď²* + OH (unbalanced) K, = 5.33 x 1015 Cd(OH)2: Cd2+ = 112.4 g/mol 17.0 g/mol = 146.4 g/mol OH- =
Transcribed Image Text:2. Cadmium is a pollutant of concern in mining. The initial concentration of cadmium in a mining wastewater (also called acid mine drainage) is 0.1 mg/L, and the EPA Maximum Contaminant Level (MCL) is 0.005 mg/L. What must the pH be so that the wastewater does not exceed the EPA MCL? Given: Cd(OH)2 → Cď²* + OH (unbalanced) K, = 5.33 x 1015 Cd(OH)2: Cd2+ = 112.4 g/mol 17.0 g/mol = 146.4 g/mol OH- =
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