a) The partial pressure of CO2 in air saturated with water vapor at 25C and 1atm is 3.04E-4 atm. Henry's constant for CO2 is 2.3E-2, and for carbonic acid PKa1=6.37. Assuming that all the dissolved CO2 can be thought of as H2CO3, verify the calculation that the pH of "normal" rainwater is about 5.7.
b) Scientists investigating acid rain measured the pH of a water sample from a lake and found it to be 4.8. The total concentration of dissolved carbonates in the lake is 4.5mmol/L. Determine the molar concentrations of the carbonate species CO3(2-), HCO3(-), and H2CO3 in the lake.
c) Suppose that 1 tonne(1t=10^3kg) of coal that is 2.5% sulfur by mass is burned in a coal-fired plant. What mass of SO2 is produced.
d) What is the pH of rainwater when the SO2 generated part c dissolves in a volume of water equivalent to 2 cm of rainfall over 2.6km^2 (the pKa1 of sulfurous acid is 1.81. Consider the water to be initially pure and at a pH of 7)
e)If the So2 in part c is first oxidized to SO3 before the rainfall, what would the pH of the same rainwater be?
f) one process used to clean SO2 from the emissions of coal-fired plants is to pass the stack gases along with air through a wet calcium carbonate slurry, where the following reaction will take place:
CaCO3s+SO2g+O2g--CaSO4s+CO2g
what mass of limestone (CaCO3) is needed to remove 50kg sulfur dioxide from stack gases if the removal process is 90% efficient?
a) The partial pressure of CO2 in air saturated with water vapor at 25C and 1atm is 3.04E-4 atm. Henry's constant for CO2 is 2.3E-2, and for carbonic acid PKa1=6.37. Assuming that all the dissolved CO2 can be thought of as H2CO3, verify the calculation that the pH of "normal" rainwater is about 5.7.
b) Scientists investigating acid rain measured the pH of a water sample from a lake and found it to be 4.8. The total concentration of dissolved carbonates in the lake is 4.5mmol/L. Determine the molar concentrations of the carbonate species CO3(2-), HCO3(-), and H2CO3 in the lake.
c) Suppose that 1 tonne(1t=10^3kg) of coal that is 2.5% sulfur by mass is burned in a coal-fired plant. What mass of SO2 is produced.
d) What is the pH of rainwater when the SO2 generated part c dissolves in a volume of water equivalent to 2 cm of rainfall over 2.6km^2 (the pKa1 of sulfurous acid is 1.81. Consider the water to be initially pure and at a pH of 7)
e)If the So2 in part c is first oxidized to SO3 before the rainfall, what would the pH of the same rainwater be?
f) one process used to clean SO2 from the emissions of coal-fired plants is to pass the stack gases along with air through a wet calcium carbonate slurry, where the following reaction will take place:
CaCO3s+SO2g+O2g--CaSO4s+CO2g
what mass of limestone (CaCO3) is needed to remove 50kg sulfur dioxide from stack gases if the removal process is 90% efficient?
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H2CO3(aq)