Question

A 4.55L sample of water contains .115grams of sodium ions. Determine the concentration of sodium ions in ppm if the density of the solution is 1.00g/mL.

Answer 1

mass of solution = density x volume = 4.55 L x 1 kg/L = 4.55 kg = 4550 g

sodium ions mass = 0.115 g

soidum ionc concentration in ppm = ( mass of sodium in g / mass of soluton in g) x 10^6

                                         = ( 0.115/4550) x 10^6 = 25.275 ppm