An industrial facility used an open paved storage yard to stage Polychlorinated biphenyl (PCB)-containing transformers removed from its facilities for 30 years. The yard is bounded by workshops on the north, highway 32 on the west, a creek on east and south. Several leaks and spills in the storage yard have been documented by an ...continues
Calculating amount of H3PO4 to reduce pH of wastewater
Wastewater flow is 1.5 million gallons per day. The pH of the incoming wastewater is 5.2 The desire is to use 30% H3PO4 to reduce the pH of the wastewater to pH 2.5. How would I calculate the amount of 30% H3PO4 needed to accomplish this pH change for the 1.5 MGD wastewater flow??? Please show me your calculations.
How much of a 0.95 M potassium hydroxide solution do you need to neutralize 39.69 ml of a 0.825 M phosphoric acid solution? (in liter)
Computing the equilibrium constant Kc
Consider the equilibrium: 2 A + B <----> 2 C You prepare a mixture with initial concentrations [A]0 = 0.03 mol/L, [B]0 = 0.023 mol/L, and [C]0 = 0. You wait until the mixture reaches equilibrium, and then you measure the concentration of C: [C]eq = 0.013 mol/L. From your experiment compute the equilibrium constant Kc of the ...continues
What are two health effects and two commonly used treatment technologies for 1. Chromium 2. MTBE 3. Sulfate? Chromium: Health effects 1. 2. Treatment Technologies 1. 2. MTBE Health effects 1. 2. Treatment Technologies 1. 2. Sulfate Health effects 1. 2. Treatment Technologies 1. 2.
Ionization energy calculations
The problems ask to find the ionization energy(kJ/mol) for a chemical process given the process and the wavelength. An example is "N2 + 80.1 (wavelength in nm) -> positive charged N2 + e-" Another is 02 + 99.3 -> positive charged 02 + e-
Chlorine, ozone and ultraviolet light
Describe and compare disinfection using chlorine, ozone and ultraviolet light by listing the advantages and the disadvantages of each disinfectant in a table.
The question asks for the ionization energy(kJ/mol) for the following chemical process given the wavelength O + (wavelength) -> O(positively charged) + e(negative charge) Wavelength = 91.2 (nm)
Concentration of atmospheric CO2
If the concentration of atmospheric CO2 were to double from its current value of 330 ppm, what would be the calculated pH of rainwater assuming that CO2 was the only acidic input? Please show step by step.
Atmospheric burden of carbon dioxide
Given that the atmospheric burden of carbon dioxide increases by about 3.8 Gigatonnes annually, calculate the annual increase in its concentration on the ppm scale. Note that the atmospheric mass = 5.1E21g; air's average molar mass = 29.0 g mole-1. Please show step by step.
