Question

Express the concentration of a 0.0700 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

so find the mass present in the solution

\(Molarity =\dfrac{n_{solute}}{L_{solution}}\)

then \(n=\dfrac{m}{Molar~mass}\)

then find the percent weight of \(F^-\) in the solution

for the second part use the fact that 1 ppm=1 mg/L

Answer 2

@aaronq thanks for your help!

Answer 3

no problem !