22. A 0.6150 g sample of steel was dissolved in a 50.00 ml measuring flask. Aliquots of 20.00 ml were taken into two 50.00 ml measuring flasks. A solution containing 0.001000 g of titanium was added to one flask. A hydrogen peroxide solution was placed in both flasks and the solutions were brought to the mark. Calculate the mass fraction (%) of Ti in steel if the following optical densities were obtained during photometry of the solutions: Ax = 0.250, Ax + st = 0.470.

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