20 mg of K^(o+) ions are present in 1 L of aqueous solution. Density of the solution is 0.8 mL^(-1). What is the concentration of K^(o+) ions in ppm?

20 mg of K^(o+) ions are present in 1 L of aqueous solution. Density o

1.	20 mg of K^(o+) ions are present in 1 L of aqueous solution. Density of the solution is 0.8 mL^(-1). What is the concentration of K^(o+) ions in ppm?
Answer» Solution :Mass of `K^(o+)` ions `(W_(2)) = 20 MG = 20 xx 10^(-3) G` Mass of solution `= V_(sol) xx d_(sol) = 100 mL xx 0.8 g mL^(-1) = 800 g` `ppm = (W_(2) xx 10^(6))/(W_(sol)) = (20 xx 10^(-3) xx 10^(6))/(800) = 25 ppm`