Posted by Susan on Sunday, September 7, 2008 at 4:20pm.
The easiest way is to remember this conversion factor. 1 ppm = 1 mg/L.
Therefore, 29 ppm Ca = 29 mg Ca/L. How many liters are in 3 pints?
29 mg Ca/L x ?? L = ??mg Ca.
The others are done the same way.
Check my thinking. Here is how you get the 1 ppm = 1 mg/L.
1 g/10^6 g = 1 ppm
Since density is same as pure water; i.e., 1.00 g/mL, then
1 g/10^6 mL = 1 ppm
1000 mg per 10^6 mL = 1 ppm.
Divide 1000 by 1000 and divide 10^6 by 1000 to obtain
1 mg per 10^3 mL = 1 ppm and
1 mg/L = 1 ppm. VOILA!
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