Express the concentration of a 0.0900 M aqueous solution of fluoride, F–, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.

Answer 1

0.0900M = 0.0900 mols/L solution.
g = mols x atomic mass = 0.0900*19 = 1.71g.
mass solution = volume x density = 1000 mL x 1.0 g/mL = 1000 grams.
mass % = (g solute/grams soln)*100 = ?
Convert to mg/L and that is ppm