p.p.m.= 50 mg/L o 50 p.p.m.
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ppm = 125 mg ion Cl
2,5 L
ppm = 50
p.p.m.= mg soluto/ vol. solución
p.p.m.= 125 mg/2.5 L
p.p.m.= 50 mg/L o 50 p.p.m.