Question

A water sample has 10 mg/L Hg2þ and a density of 1.0 g/mL (atomic weight of Hg¼200.59). Calculate the following: (a) Hg2þ in ppb, (b) Hg2þ in mM, and (c) the number of Hg2þ ion in 1 L of this sample containing 10 mg/L Hg2þ (Avogadro’s number¼6:0221023 /mol).