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Question 1 5 pts The extinction coefficient for FD&C Blue Dye #1 is 138,500 cm-L/mol at...
Question 1 5 pts The extinction coefficient for FD&C Blue Dye #1 is 138,500 cm-L/mol at 630 nm. A chemist collected the following data at 630 nm. She also found that the absorbance of an FD&C Blue Dye #1 solution of unknown concentration was 0.229. Use your graphing calculator to generate a standard curve from this data set, and use it to determine the concentration of the unknown solution. Express your answer in 10-5M (if your answer is 5.52x105M then...
Question 1 5 pts The extinction coefficient for FD&C Blue Dye #1 is 138,500 cm-L/mol at 630 nm. A chemist collected the following data at 630 nm. She also found that the absorbance of an FD&C Blue Dye #1 solution of unknown concentration was 0.212. Use your graphing calculator to generate a standard curve from this data set, and use it to determine the concentration of the unknown solution. Express your answer in 10-SM (if your answer is 5.52x10-SM then...
The extinction coefficient for FD&C Blue Dye #1 is 138,500 cm-L/mol at 630 nm. A chemist collected the following data at 630 nm. She also found that the absorbance of an FD&C Blue Dye #1 solution of unknown concentration was 0.295. Use your graphing calculator to generate a standard curve from this data set, and use it to determine the concentration of the unknown solution. Express the answer in micromolar (notice micro means 10-6) Concentration of Blue Dye (M) Absorbance...
Red food dye (FD&C Red 40, also known as allura red AC) has the formula C18H14N2Na2O8S2. 1. What is the molar mass of FD&C Red 40? To make a solution you take 0.0097 g of FD&C Red 40. 2. How many moles of FD&C Red 40 are in your sample? You dissolve the sample of FD&C Red 40 in enough water to make 250.0 mL of solution. We call this the stock solution. 3. What is the concentration of the...
Calculate the molarity of a solution of FD&C Blue Dye No. 1 (MW 792.8g/mol) if a 0.5028-g sample is diluted to 100 ml in a volumetric flask and then two serial dilutions are carried out in which 5-mL aliquots are diluted to 100 mL using volumetric glassware.
Chemistry lab question! Help please!
A student finds a solution of blue dye #2 (another food dye we are not using in this lab) in a 1.0 cm cuvette has a maximum absorbance of 0.572 at 613 nm. The molar extinction coefficient, E, of blue #2 at the same wavelength is 1.21 * 10^4 M^-1 cm^-1. Calculate the concentration of this solution. The same student as in question 3 brings the blue dye #2 solution to her friend Bob to...
Need help for questions 2 and 4
G. C. 1-7 Determination of the Dye Concentration in a Powdered Drink G. C. 1-7: PART 2 GROUP DISCUSSION QUESTIONS Lab partners' name: 1. Your TA will provide you with the correct concentration of the dye in the powdered drink solution. Calculate the percentage error for your data. (experimental value - accepted value) accepted value 2. The empirical formula for the Brilliant Blue dye is CanHyN,O,S, Na2 and the formula weight i 79286...
Percent by mass of dye in Fruit Loops cereal 11.56*100 QUESTIONS: 1. If the molar extinction coefficient (E) of a compound is 2.5 x 108 moli'cmat $28 nm and the Abs Cat 528 nm) 0.254 Dind the concentration of that solution. (assume a path length of 1.0 cm) 2. If a student measures a sample that gives an Abs = 1.85 at the 2max, is this data reliable? If not, then what might they do to improve their data? 3....
The last digit in the answer is four X.X4
A 3.75 mL unknown sample containing red and blue dyes was separated on a solid phase extraction column. As it was eluted from the column, each sample was diluted to a total volume of 50.00 mL in a volumetric flask with the appropriate solvent. UV spectrophotometry was used to determine the amount of dye in the diluted sample. The data collected by the students in the lab are provided below. Sample...
I
need help doing just the questions, not the graph or the
conclusion
F17 MATERIALS 0.12 g [Fe(phen)3]Cl2 (student's red crystals from the previous experiment) 0.5 mL unknown [Fe(phen)3]Cl2 solution 175 mL DI water A. Series of Dilutions: Concentration of stock solution 3.15x103M 105gx mol 667.354 IL 0.05004 Concentrations of the series of dilutions Solution Concentration 0.2/25 2.52x10m 0.4/25 5.04×105m 0.6/25 7.56 X10 sm 0.8/25 1.0088 10" 1.0/25 1.26x10 "m Abs atmas 0.20_ Unknown 514nm 0.52 1.42 Solution 0.2/25 0.4/25...