One
way of expressing concentration is by expressing it by parts per million or
ppm. Parts per million is equal to 1 milligram of solute per kilogram of
solution. The problem is solved as follows:
ppm
= 0.02 g (1000mg/1g) /( 1000 g + 0.02 g) (1 kg / 1000g) = 2x10^-5 ppm
