Calculate the exact alkalinity (in mg/L as CaCO3) of a water containing 120.0 mg/L of bicarbonate ion and 15.00 mg/L of carbonate ion. The water has a pH of 9.4.
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- Calculate the exact alkalinity (in mg/L as CaCO3) of a water containing 120.0 mg/L of bicarbonate ion and 15.00 mg/L of carbonate ion. The water has a pH of 9.4.
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- Calculate "exact" alkalinity of the water containing 130 mg/L of bicarbonate ion, 25.00 mg/L of carbonate ion and the pH is 9.3The partial pressure for CO2 at the earth’s surface is 10^−3.4 atm. 1) Determine the partial pressure of CO2 in the groundwater aquifer if the dissolved CO2 is known to be 10 parts per thousand and pressure is 1atm 2) Calculate the ratio between the surface and the ground water please explain and solveHow much dissolved oxygen (mg/L) is present in 27°C freshwater?
- A 0.15 L sample of water has an initial dissolved oxygen level of 8.35 mg/L. After five days in incubation in a 300 mL BOD bottle, the dissolved oxygen level has decreased to 4.09 mg/L. Calculate the BOD5.An urban sludge basin has a volume of 500 m3. The basin is initially 64% full. The sludge with a density of 1320 kg/m3 is taken away from the basin at a rate of 4 ton/day. How long will the basin take to be fully emptied? Assume the basin is now initially full and re-estimate the time to empty it completelyComputation: Ratio Strength, PPM, mg%Show your complete solution.1. If a city water supply has a limit of 250 ppm of nitrate ion, what is the maximum amount of nitrate ion in grams that may be present in a 10,000 gallon reservoir?Amount of nitrate ion in grams = ?
- Assume the described is at steady state. A fluid goes up to an aquifer that has groundwater and a chloride concentration of zero. The groundwater reservoir is 20,000 m^3 and has an outflow of 2 m^3/hour. If the fluid has a chloride concentration of 0.04 M and the aquifer outflow has 0.0084 M, how much chloride is precipitated in the reservoir? Any missing chloride is due to chemical reaction consumption.Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 Determine the 95% confidence interval for the true mean DO concentration.Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 Local environmental regulations prescribe a minimum DO concentration of 2.0 mg/L. Perform a hypothesis test to determine whether the river’s water quality satisfies local regulations at a 5% significance level. (follow the 8step hypothesis test)
- Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 a. Local environmental regulations prescribe a minimum DO concentration of 2.0 mg/L. Perform a hypothesis test to determine whether the river’s water quality satisfies local regulations at a 5% significance level. (follow the 8step hypothesis test)b. Assume that the daily DO concentration is normally distributed. Estimate the values of the parameters μ and σ.c. Determine the 95% confidence interval for the true mean DO concentration.Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 Assume that the daily DO concentration is normally distributed. Estimate the values of the parameters μ and σ.A lake is fed by a polluted stream and a sewage outfall. The stream and sewage wastes have a decay rate coefficient (k) of 0.9/day (1st order units). Assuming complete mixing and no other water losses or gains, what is the steady-state pollutant concentration as mg/L in the lake?Incoming Stream: C = 10 mg/L, Q = 90 m^3/sSewage Outfall: C = 300 ppm, Q = 0.5 m^3/sLake: V= 10,000 m^3