Parts Per Million is defined as the number of parts of a solute per one million parts of a solution.
ppm = (Weight of Solute / Weight of Solution) × 10⁶
Data Given;
Weight of Solute (Hg) = 2.2 mg = 0.0022 g
Weight of Solution (Tap Water) = 750 g
Putting Values,
ppm = (0.0022 g / 750 g) × 10⁶
ppm = 2.93 × 10⁻⁶ × 10⁶
ppm = 2.93
Result:
It means if given tap water is containing 1 million particles then 2.93 particles in that are of Hg.
