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posted by Jerry on Saturday, February 26, 2011 at 11:13pm.
How do you dilute 100mL of 20ppm Fe3+ to 1,2,4,6,8 ppm, 50mL each?
mL x ppm = mL x ppm 50 x 1 = mL x 20 solve for mL. That's 2.5 mL. try it. 20 ppm x (2.5 mL/50 mL) = 1 ppm.
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