Question

What is the concentration of a solution, in parts per million, if 0.02 gram of Na3PO4 is dissolved in 1000 grams of water?
(1) 20 ppm (3) 0.2 ppm
(2) 2 ppm (4) 0.02 ppm

Answer 1

ppm = mass of solute in mg / mass of solvent in kg

0.02 x 1000 = 20 mg  (solute )

1000 / 1000 = 1.0 kg

ppm = 20 / 1.0

= 20 ppm

Answer (1)

hope this helps!