Question

A 5.00-mL aliquot of a solution that contains 2.66 ppm Fe2+ is treated with an appropriate...

A 5.00-mL aliquot of a solution that contains 2.66 ppm Fe2+ is treated with an appropriate excess of thiocyanate and diluted to 50.0 mL. The molar absorptivity of a Fe2+-thiocyanate solution at 580 nm is 7000 L mol-1 cm-1. What is the absorbance of the above diluted Fe2+-thiocyanate solution at 580 nm in a 5.00-cm cell?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

A = 1.6

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 2.50-mL aliquot of a solution that contains 6.76 ppm iron(III) is treated with an appropriate...
A 2.50-mL aliquot of a solution that contains 6.76 ppm iron(III) is treated with an appropriate excess of KSCN and diluted to 50.0 mL. What is the absorbance of the resulting solution at 480 nm in a 2.50-cm cell? Assume a value of 7.00 x 103 for absorptivity constant.
The colorless, water-soluble ligand 1,10-phenanthroline (phen) forms a chelate complex with Fe2+. The wavelength maximum is...
The colorless, water-soluble ligand 1,10-phenanthroline (phen) forms a chelate complex with Fe2+. The wavelength maximum is 510 nm. This ligand can be used to determine the concentration of unknown Fe2+. The experimental procedure involves treating an iron containing solution with a reducing agent to ensure than all iron is in the +2 oxidation state, then adding excess phen. An 8.00 ml aliquot of a solution containing 15.00 μg of iron is added to a 100 ml flask and diluted to...
25.0 ml C solution is diluted to 50.0 ml and the absorbance is 0.416 in 348...
25.0 ml C solution is diluted to 50.0 ml and the absorbance is 0.416 in 348 nm in a 1.00-cm cuvette. 25.0 ml second solution is added 10.0 ml solution that contains 23.4 ppm of C. After diluted to 50.0 ml this solution has absorbance 0.610 in the same cuvette and wavelength. Calculate concentration (ppm) C in sample.
You dissolve a compound with a molecular mass of 287.57 g/mol in a 10-mL volumetric flask....
You dissolve a compound with a molecular mass of 287.57 g/mol in a 10-mL volumetric flask. You remove a 1.00-mL aliquot, place it in a 25-mL volumetric flask and dilute it to the mark. The absorbance of this diluted solution at 349 nm was 0.486 in a 1.000-cm cuvet. The molar absorptivity for this compound at 349 nm is ε349 = 5911 M–1 cm–1.
Four tablets of an iron dietary supplement were destroyed by digestion, leaving the iron(III) in aqueous...
Four tablets of an iron dietary supplement were destroyed by digestion, leaving the iron(III) in aqueous solution freed of organics. This mixture was diluted to 2.00L. Two 5.00 mL aliquots were treated as below to determine the iron by the method of standard addition. a) One 5 mL aliquot was treated with 25.00 mL of ligand solution, diluted to 50.0 mL, and read 0.489 As in a 1.0cm cell at 606 nm. b) To a second 5 mL aliquot, a...
You dissolve a compound with a molecular mass of 271.98 g/mol in a 10-mL volumetric flask....
You dissolve a compound with a molecular mass of 271.98 g/mol in a 10-mL volumetric flask. You remove a 1.00-mL aliquot, place it in a 25-mL volumetric flask and dilute it to the mark. The absorbance of this diluted solution at 329 nm was 0.485 in a 1.000-cm cuvet. The molar absorptivity for this compound at 329 nm is ε329 = 6133 M–1 cm–1. (a) What is the concentration of the compound in the cuvet? (b) What is the concentration...
Calculate the concentration in ppm of a K2CrO4 solution that has a %T of 77.17 in...
Calculate the concentration in ppm of a K2CrO4 solution that has a %T of 77.17 in a 4.50cm cell at 372nm, the molar absorptivity is 4,459.0 L mol-1 cm-1. [Report the result to two decimal places]
Ali had studied the complexation experiment between Iron (III) (Fe 3+ ) and Potassium thiocyanate (KSCN)....
Ali had studied the complexation experiment between Iron (III) (Fe 3+ ) and Potassium thiocyanate (KSCN). He prepared 3.4X10 -5 M of complex solution and the reaction produced orange color of complex Ferrothiocyanate Fe(SCN) 2+ which has a molar absorptivity of 7.00 X 10 3 L cm -1 mol -1 . Then he used Ultraviolet–visible spectrophotometry (UV-Vis) to analyze the complex. He use a 1.00cm cuvette cell to place the complex samples, sharp and high intensity band was obtained at...
An unknown amount of a compound with a molecular mass of 259.61 g/mol is dissolved in...
An unknown amount of a compound with a molecular mass of 259.61 g/mol is dissolved in a 10-mL volumetric flask. A 1.00-mL aliquot of this solution is transferred to a 25-mL volumetric flask and enough water is added to dilute to the mark. The absorbance of this diluted solution at 347 nm is 0.525 in a 1.000-cm cuvette. The molar absorptivity for this compound at 347 nm is ε347 = 6557 M–1 cm–1. (a) What is the concentration of the...
1. A standard solution of 100 ppm (100 mg / L) of an organic compound was...
1. A standard solution of 100 ppm (100 mg / L) of an organic compound was analyzed and this has a maximum absorption band at 270 nm. A calibration curve was prepared from which the following data were obtained: Conc. (Ppm) 1 1,5 2 3 4 Absorbance 0.1282   0.1940 0.2615 0.3995 0.5422        If 2 ml of an unknown solution of this compound are diluted to 50 ml, an absorbance of 0.425 is obtained. a. Calculate the concentration...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT