The molar absorptivity of the dye rhodamine 6G is 10-5 M-1 cm-1 at 540 nm. Estimate e''(relative permittivity) for a 10-3 M solution of this dye in ethanol. (the index of refraction of ethanol is 1.36)
The molar absorptivity of the dye rhodamine 6G is 10-5 M-1 cm-1 at 540 nm. Estimate...
6. (5 pts) Calculate the molar absorptivity, E, for a dye solution of 0.00 È, for a dye solution of 0.000215 mol/L in a cell of pathlength 1.95 cm and a transmittance, T, of 0.255.
Please show all work, conversions, and units. The absorption maximum for a dye is 489 nm. At this wavelength, the absorbance of a dye solution measured in a 1 cm quartz cell is 0.027. The molar absorptivity is of the dye at 489 nm is 225 L mol-1 cm-1. What is the concentration of the dye in the solution? A) 5.5 x 10-5 M B) 1.2 x 10-4 M C) 2.5 x 10-7 M D) 5.5 x 10-2 M
The intensity of light transmitted through an absorbing solution is given by the Beer-Lambert law, 1 = lo exp (-€*cxd), where lo is the intensity of the light source, ε is the molar absorptivity of the absorber, c is the concentration of the absorber in the solution and d is the distance travelled by the light through the solution. Calculate the molar absorptivity of Rhodamine 6G dye given that only 20% of the light source's intensity is transmitted through 1...
Assume the molar absorptivity (ε) for CoCl42- at 700 nm is 412.2 M-1 cm-1. If d, the cell path length, is equal to 0.85 cm for the cuvettes being used, and if the measured absorbance (A) at 700 nm is 1.305, what is [CoCl42-]? Express your response to four digits after the decimal.
The molar absorptivity of FD&C Yellow #5 at 430 nm is =2.43*104 M-1cm-1. The absorbance of a sample of Gatorade Lemon-Lime at 430 nm is measured as 0.27 using a 1 cm cuvette. Assuming the path length is 1 cm, calculate the molarity of Yellow #5 in Gatorade.
M-1-cm* (at a wavelength The transition metal complex ion [Ru(Bipy)a]* has a molar absorptivity of 1.35x 10 2. Ceof 450 nm). Calculate the absorbance of a 1.80x10 M solution of [Ru(Bipy))2 at 450 nm when measure in a 1.00 cm cell. CamScanner
C. Problems 1Explain the difference between transmittance, absorbance, and molar absorptivity Which one is proportional to concentration? 2. The absorbance of a 2.3lx 10 M solution of a compound is 0.822 at a wavelength of 266 nm in a 1.00 cm cell. Calculate the molar absorptivity at 266 nm 3. A compound with a molecular weight of 292.16 was dissolved in a 5-ml volumetric flask. A 1.00-mLaliquat was withdrawn, placed in a 10-mL volumetric flask, and diluted to the mark....
Calculate the expected absorbance of solution of a 5.50x10-6 M solution of Blue # measured at 629 nm in a 1.50cm cell. The molar absorptivity for Blue #1 is 1.30×105 M-1cm-1 at 629 nm 4. A 2.50x10-5 M solution of a specific dye has an absorbance value of 1.300 when measured at 525 nm in a cell with a path length of 2.00 cm. Calculate the molar absorptivity of this dye at this wavelength 5.
The complex FeSCN^+2 has a molar absorptivity of 7.00 times 10^3 L/(mol.cm) at a wavelength of 580 nm. The percent transmittance of an unknown solution was measured to be 65.9% in a 1.00 cm cell. What was the concentration of the unknown solution?
Questions 7-10 concern the [Fe(SCN)2l+ complex that has a molar absorptivity ε = 7.00x103 M-1cm-1 at 580 nm (maximum absorption wavelength). Final answer: 7. Calculate the absorbance of a 2.50 x 10-5 M solution of the complex at 580 nm in a 1.00-cm cell. Final answer: 8. Calculate the absorbance of a solution in which the concentration of the complex is twice that in Question 6. Final answer: 9. Calculate the transmittance of the solution described in Question 7? Final...