40. Solution to Chemistry Problem

34.2 The following data were obtained to determine barium using the calibration graph method:
Concentration of standard solutions Ba, μg/cm3 0.10 0.20 0.30 0.40 0.50
Atomic absorption at 232 nm (number of divisions) 0.05 0.10 0.15 0.20 0.25
A 0.0905 g sample of the alloy was dissolved in a mixture of acids and transferred to a 500.0 cm3 volumetric flask. Before analysis, the solution was diluted 10 times. In this case, the atomic absorption of Ba was equal to 0.125 scale divisions. Determine the mass fraction (%) of barium in the alloy.