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b) A 60.00 ml of a sample of river water was titrated with 0.0016 M of sodium dichromate and I required 12.50 mL of dichromate to reach the end point. What is COD in mg of Oxygen /L?

b) A 60.00 ml of a sample of river water was titrated with 0.0016 M of sodium dichromate and I required 12.50 mL of dichromate to reach the end point. What is COD in mg of Oxygen /L?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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b) A 60.00 ml of a sample of river water was titrated with 0.0016 M of sodium dichromate and Q T required 12.50 ml of dichromate to reach the end point. What is COD in mg of Oxygen /L? c) In a lake in the top of Jebel Shams with altitude of 3 km. if atmospheric pressure decreases by 0.1067 atm every km of altitude. i) Calculate both the pressure and temperature at the top of the mountain if the temperature in the valley is 25 °C. ii) Calculate the concentration of oxygen in ppm in the lake knowing that Henry constant, K = 1.3x 10 mol L' atm. A type of fresh water fish requires minimum 3.5 ppm of dissolved oxygen. Will this fish survive in such lake? d) Calculate total hardness in ppm of a solution of both 55 mg/L Al:(SO4)) and 45 mg/L Mg(NO3)3.
Transcribed Image Text:b) A 60.00 ml of a sample of river water was titrated with 0.0016 M of sodium dichromate and Q T required 12.50 ml of dichromate to reach the end point. What is COD in mg of Oxygen /L? c) In a lake in the top of Jebel Shams with altitude of 3 km. if atmospheric pressure decreases by 0.1067 atm every km of altitude. i) Calculate both the pressure and temperature at the top of the mountain if the temperature in the valley is 25 °C. ii) Calculate the concentration of oxygen in ppm in the lake knowing that Henry constant, K = 1.3x 10 mol L' atm. A type of fresh water fish requires minimum 3.5 ppm of dissolved oxygen. Will this fish survive in such lake? d) Calculate total hardness in ppm of a solution of both 55 mg/L Al:(SO4)) and 45 mg/L Mg(NO3)3.
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