Nitrification of water is a biological process for removing ammonia from wastewater as ammonium: NH4 (aq) + 2 02 (g) --> NO31 (aq) + 2 H* (aq) + H2O (1) The first-order rate constant is given as: k = 0.47eº.095(T – 0.15°C) where k is in day1 and T is in degrees Celsius. a. If the initial concentration of NH3 is 4.0 mol/m³, how long will it take to reduce the concentration to 0.80 mol/m³ in the spring (T = 20°C) b. Assuming the same amounts in part a, how long will it take to reduce the concentration in the winter (T = 10°C) c. Using your answer in part a, what is the rate of 02 consumption?

Chemistry for Engineering Students
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Chapter11: Chemical Kinetics
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Problem 11.36PAE: The reaction NO(g) + O,(g) — NO,(g) + 0(g) plays a role in the formation of nitrogen dioxide in...
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8. Nitrification of water is a biological process for removing ammonia from wastewater as
ammonium:
NH4 (aq) + 2 02 (g) --> NO31 (aq) + 2 H* (aq) + H2O (I)
The first-order rate constant is given as:
k = 0.47e0.095(T – 0.15°C)
where k is in day1 and T is in degrees Celsius.
If the initial concentration of NH3 is 4.0 mol/m3, how long will it take to reduce
the concentration to 0.80 mol/m³ in the spring (T = 20°C
b. Assuming the same amounts in part a, how long will it take to reduce the
concentration in the winter (T = 10°C)
c. Using your answer in part a, what is the rate of O2 consumption?
a.
Transcribed Image Text:8. Nitrification of water is a biological process for removing ammonia from wastewater as ammonium: NH4 (aq) + 2 02 (g) --> NO31 (aq) + 2 H* (aq) + H2O (I) The first-order rate constant is given as: k = 0.47e0.095(T – 0.15°C) where k is in day1 and T is in degrees Celsius. If the initial concentration of NH3 is 4.0 mol/m3, how long will it take to reduce the concentration to 0.80 mol/m³ in the spring (T = 20°C b. Assuming the same amounts in part a, how long will it take to reduce the concentration in the winter (T = 10°C) c. Using your answer in part a, what is the rate of O2 consumption? a.
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