answer soon as many as possible b) A 60.00 ml of a sample of river water was titrated with 0.0016 M of sodium dichromate andQ 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 by0.1067 atm every km of altitude.i) Calculate both the pressure and temperature at the top of the mountain if the temperature in thevalley 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 dissolvedoxygen. 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/LMg(NO3)3.

The volume of the sample = 60 mL Molarity of dichromate = 0.0016 M Volume of dichromate =…

Answered: b) A 60.00 ml of a sample of river…

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?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter4: Calculations Used In Analytical Chemistry

Section: Chapter Questions

Problem 4.24QAP

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Question

answer soon as many as possible

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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