Chemistry

Chemistry, 04.07.2019 12:20, itsyagirlbella

Based upon the absorbance spectrum of red dye #40, what would be the ideal wavelength to carry out a spectrophotometric experiment on the dye?

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Physics, 25.06.2019 10:40, ella3714

Access link #1 and read the section about light intensity (i0 and i), transmittance (t) and absorbance (a). as described in question 1, an absorbance spectrum is a graph that illustrates the correlation between wavelength and absorbance. the wavelength of maximum absorbance, λmax, is where the absorbance is the greatest in the absorbance spectrum. access the simulation of link #2 to (1) create an absorbance spectrum between 200 nm and 700 nm with 10 to 15 data points, and (2) determine the wavelength of maximum absorbance to within 5 nm. the simulation will you understand the use and function of a uv-vis spectrophotometer in our lab. approach (link #2): run simulation to obtain the transmitted light intensity at various wavelengths (between 200 nm and 700 nm, 10 to 15 data points). each simulation should be run long enough to detect at least 10000 photons. for each wavelength, calculate the transmittance of the solution (light intensity of blank is 3300 photons/second; t = i÷ i0). calculate the absorbance of the solution using transmittance at each wavelength (a = −log10( create the absorbance spectrum by plotting absorbance (y-axis) versus wavelength (x-axis). determine λmax by locating the wavelength at the maximum absorbance.

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Biology, 16.10.2019 00:30, kandi2565

Cyclohexanone exhibits its strongest ir absorption band at 5.86 μm, and at this wavelength there is a linear relationship between absorbance and concentration. (a) identify the part of the molecule responsible for the absorbance at this wavelength. (b) suggest a solvent that would be suitable for a quantitative analysis of cyclohexanone at this wavelength. (c) a solution of cyclohexanone (4.0 mg/ml) in the solvent selected in part (b) exhibits a blank-corrected absorbance of 0.800 in a cell with a path length of 0.025 mm. what is the detection limit for this compound under these conditions if the noise associated with the spectrum of the solvent is 0.001 absorbance units?

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Chemistry, 17.10.2019 18:20, toxsicity

Which statement about the spectrophotometric analysis of red 40 dye is true? select one: a. the intensity of the color of the solution is indirectly proportional to concentration of the red 40 dye. b. the calibration plot is a graph of concentration of red 40 dye (y-axis) versus absorbance (x-axis). c. absorbance = slope x concentration. d. if there is no red 40 dye present in the solution, the absorbance will be one.

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Computers and Technology, 30.10.2019 06:31, joneil1952

Simultaneous determination of ti and v. determine the % of each if 1.000 g of a steel was dissolved and diluted to 50.00 ml; spectrophotometric analysis produced an absorbance of 0.172 at 400 nm and 0.116 at 460 nm. two separate solutions were also analyzed; the first solution which contained ti (1.00 mg/50.00 ml), gave an absorbance of 0.269 at 400 nm and 0.134 at 460 nm. the second solution contained v( 1.00 mg/50.00 ml) and gave an absorbance of 0.057 at 400 nm and 0.091 at 460 nm.

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Based upon the absorbance spectrum of red dye #40, what would be the ideal wavelength to carry out a...

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