Question

prepare 100 ppm homoslate standard solution use density or molar mass

Answer 1

Homosalate (C₁₆H₂₂O₃)

molar mass=262.36g/mol

density=1.04g/ml

If ppm is mass of compound per unit volume of solution then ppm=mg/L

100ppm=100mg/L=100mg*(1g/1000mg)/L=0.1 g/L

So,0.1g of homosalate neeed to be made into 1L solution.

density=1.04g/ml

So volume for 0.1 g=mass/density =0.1g/1.04g/ml=0.096 ml

In a volumetric flaskof 1L,fill 500 ml water and add 0.096 ml of homosalate,shake well to dissolve .Now add distilled water upto 1 L mark.This makes for 100 ppm homoslate standard solution