Unformatted text preview: percent to ppm, multiply by 10,000. We will commonly be dealing with ppm in our class in terms of milligrams per kilogram (mg/kg). When dealing with dilute solutions that have specific gravities close to that of water (1.0 g/ml), we can appropriately substitute 1 in for "kilogram" in the denominator since 1 kg of water = 1 l at 25°C. Another proportionality commonly used in this course is pounds per acre (lb/acre). Because an acre-furrow-slice (an acre 6 inches deep) is assumed to weigh 2,000,000 lbs., lbs/acre is the same as parts per 2 million. Therefore, to convert percent or ppm to lbs/acre, multiply by 20,000 or 2, respectively. Some comparative definitions: if 1% is then 1 ppm is (a) 1 lb. out of 100 lbs. 1 lb. out of 1,000,000 lbs. (b) 1 g. out of 100 g. 1 g. out of 1000 kilograms or 1,000,000 g. (c) 1 mg out of 0.1 g. 1 mg out of 1.0 kilogram (d) 1 mg in 0.1 ml 1 mg in a liter...
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This note was uploaded on 06/21/2011 for the course NRES 201 taught by Professor Olson,k during the Spring '08 term at University of Illinois, Urbana Champaign.
- Spring '08