57. Solution to Chemistry Problem
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3. To determine tin in the alloy, a calibration graph was constructed. Based on the following data:
Concentration of standard Sn solution, μg/cm3 2.0 4.0 6.0 8.0 10.0
Optical density at 283 nm 0.160 0.320 0.480 0.640 0.800
A 0.50 g sample of the alloy was dissolved in a mixture of acids and transferred to a 250 cm3 measuring flask. The resulting solution was diluted 25 times and the optical density was measured, which was 0.680. Determine the mass fraction of tin in the alloy.
Concentration of standard Sn solution, μg/cm3 2.0 4.0 6.0 8.0 10.0
Optical density at 283 nm 0.160 0.320 0.480 0.640 0.800
A 0.50 g sample of the alloy was dissolved in a mixture of acids and transferred to a 250 cm3 measuring flask. The resulting solution was diluted 25 times and the optical density was measured, which was 0.680. Determine the mass fraction of tin in the alloy.
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