The chemical trichloroethylene (TCE) is a colorless liquid found in very low concentration in drinking water....
The chemical trichloroethylene (TCE) is a colorless liquid found in very low concentration in drinking water. The EPA has set a maximum concentration of TCE in drinking water at 5 ppb. Consuming water on a regular basis that contains higher concentrations can lead to cancer.
(a) What is the ppb concentration in a 200.0−L (200.0 kg) sample of water that contains 0.15 mg TCE?
Homework Answers
mass of TCE (solute) = 0.15 mg = 0.15 * 10-6 kg
mass of water (solvent) = 200 kg ...........................(nearly equal to mass of solution )
According to the formula of ppb.........
ppb = (mass of solute / mass of solution ) * 109
= (0.15 * 10-6 kg / 200 kg) * 109
= 0.75 ppb
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