Calculate the pH and alkalinity (in mol/L) of a water that contains 120.0 mg/L of bicarbonate ion and 15.00 mg/L of carbonate ion.
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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.How much dissolved oxygen (mg/L) is present in 27°C freshwater?Water is taken from a river to cool a power plant. The water accepts waste heat and is returned water back to the river. The return water has a flow rate of 200 gal/min, and the receiving river has a flow rate of 3,000 gal/min and a temperature of 18 degrees C in the summer at the point of mixing. If the maximum allowable temperature of the river after mixing is 22 degrees C before the fish die, what is the maximum allowable temperature of the return water?
- A bottle is filled with river water. The initial dissolved oxygen concentration is 10.2 mg/L. After 5 days the dissolved oxygen concentration is 3.0 mg/L. Calculate the BOD 5. in mg/lCalculate dissolved oxygen concentrations at 0 and 25 degrees using Henry's formula.if temperature of a water sample is 20C and salinity is 30 ppt, what is the max concentration of dissolved oxygen?
- The 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 solveWhat volume of water is contained in one cubic meter of material if the porosity is 20% and the saturation expressed as a fraction of the pore space is 30% ?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.
- A desalination plant produces 10,000 m3/day of brine with concentration of 80 g (gram)/L. This brine will be thrown into the ocean. But the concentration has to be lowered to 60 dS/m. How much seawater should be mixed with the brine if the seawater has a salinity of 3%.? Calculate how much salt is in the brine in Tons/day.Calculate "exact" alkalinity of the water containing 130 mg/L of bicarbonate ion, 25.00 mg/L of carbonate ion and the pH is 9.32. A river with 400 ppm of salts (a conservative substance) and an upstream flow of 25.0 m3/s receives an agricultural discharge of 5.0 m3/s carrying 2,000 mg/L of salts (see Figure below). The salts quickly become uniformly distributed in the river. A municipality just downstream withdraws water and mixes it with enough pure water (no salt) from another source to deliver water having no more than 500 ppm salts to its customers. What should be the mixture ratio F of pure water to river water?