|MadSci Network: Chemistry|
Hi Lauren, The Ideal Gas Law: PV = nRT P = pressure (atm) (1 atm = 760 mmHg) V = volume (Litre) n = moles R = Ideal Gas Constant (0.0821 L*atm) T = temperature (degrees Kelvin) (0C = 273K) In my line of work, I generally deal with hydrocarbon gases. Occasionally, we are asked to calculate the volume composition of gas. The samples arrive at the lab in small cylinders we call peanut bombs. We take an initial weight of the bomb and pass the gas through an absorbing solution to determine hydrogen sulfide content. Therefore, after passing a quanitity of gas, the final weight of the bomb provides us the total number of grams of gas. Hydrogen sulfide concentration is determined by titrating the absorbing solution with a normality of silver nitrate solution. Therefore, we can calculate the number of moles of hydrogen sulfide and the volume of hydrogen sulfide gas. Along with the gas chromatographic analysis, the total composition of the sample may be calculated in volume, mass, or mole percent.
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