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A compound with molecular mass 292.16 g/mol was dissolved in a 5-mL volumetric flask. A
Chapter 17, Problem 17-16(choose chapter or problem)
A compound with molecular mass 292.16 g/mol was dissolved in a 5-mL volumetric flask. A 1.00-mL aliquot was withdrawn, placed in a 10-mL volumetric flask, and diluted to the mark. The absorbance at 340 nm was 0.427 in a 1.000-cm cuvet. The molar absorptivity at 340 nm is 340 6 130 M1 cm1 . (a) Calculate the concentration of compound in the cuvet. (b) What was the concentration of compound in the 5-mL flask? (c) How many milligrams of compound were used to make the 5-mL solution?
Questions & Answers
QUESTION:
A compound with molecular mass 292.16 g/mol was dissolved in a 5-mL volumetric flask. A 1.00-mL aliquot was withdrawn, placed in a 10-mL volumetric flask, and diluted to the mark. The absorbance at 340 nm was 0.427 in a 1.000-cm cuvet. The molar absorptivity at 340 nm is 340 6 130 M1 cm1 . (a) Calculate the concentration of compound in the cuvet. (b) What was the concentration of compound in the 5-mL flask? (c) How many milligrams of compound were used to make the 5-mL solution?
ANSWER:Step 1 of 4
a)
To calculate the concentration of the compound in the cuvette, we can use the Beer-Lambert law
