Calculate the pH of a solution that has a pOH of 8.70.
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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 9.3Calculate dissolved oxygen concentrations at 0 and 25 degrees using Henry's formula.Fresh and seawather flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer. The pressure difference between the two pipelines is to be determined. The densities of seawather = 1035 kg/m3 and mercury=13600 kg/m3.
- Determine the exact and approximate alkalinity of a water sample that contains 120.0 mg/L of (CO3)^2- and 75.0 mg/L of (HCO3)^- at a pH of 9.7 at 25 degrees CelciusDetermine the pH of a solution that contains 2*(10^-4) mg/L of OH- (at 25 degrees).The gauge pressure reading under a settling tank is 57 78 kilopascal. The settling tank has a radius of 4.2 meters Calculate the height of the fuel inside given that its SG is 0.88 MT/m 3
- A water sample has a pH of 7.25. Determine the concentration of hydroxyl ion in the water sample.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.A laboratory test on a suspension of solid in liquid gave the following information:Original height of sludge before settling 10 inchesFree settling rate 0.10 inch per minuteHeight of sludge at the end of free settling period 6.5 inchesHeight of sludge at the end of 120 minutes 4 inchesHeight of sludge when completely settled 1.5 inchesOne thousand cubic feet of similar sludge is to be settled in a vertical cylindrical tank, the diameterof which is equal to the depth of the liquid suspension in it. Determine the time it would take forthe solid to settle to a height of 20% of the original height of the sludge.
- Briefly discuss the effect of alkalinity on flocculation. What will happen to the pH and alkalinity of the water as alum is added? Justify your answer.Use the psychrometric chart for the following questions unless asked to “calculate”, in which case you must use the appropriate calculations. 1. Calculate the enthalpy (H in kJ/kg) of an air/water vapour mixture which is at 25oC and 0% rh (i.e. dry air). 2. Check your result from question 1 with the psychrometric chart. Are they the same? 3. Now calculate the new enthalpy of the same air/water vapour mixture after raising the rh to 50% (still at 25oC). 4. Check your result again with the psychrometric chart. Are they the same? 5. How much water vapour had to be added to it to raise the rh to 50%? 6. Without changing the enthalpy (i.e. an adiabatic process), how much more water vapour could the air/water vapour mixture from question 4 hold before becoming saturated? 7. What is the new temperature of the air/water vapour mixture of question 5 at saturation? (See over for #8) Timusk 2007 8. Calculate the January ventilation cost for a typical leaky old Toronto house measuring 5m wide x…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 solve