dont given Ai solution... Given that the path length of the cuvette is 1 cm, what is the extinction coefficient of the 0.020 mM Yellow 5 dye at lambda max? Given the data in the table below, what is the concentration of the diluted solution? stock solution concentration 0.075 M stock solution absorbance 1.84 diluted solution absorbance 0.78

dont given Ai solution... Given that the path length of the cuvette is 1 cm, what is the extinction coefficient of the 0.020 mM Yellow 5 dye at lambda max? Given the data in the table below, what is the concentration of the diluted solution? stock solution concentration 0.075 M stock solution absorbance 1.84 diluted solution absorbance 0.78

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter5: Equilibrium, Activity And Solving Equations

Section: Chapter Questions

Problem 5P

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The equilibrium constant for the conjugate acid-base pair HIn+H2OH3O++In is 8.00 10-5. From the additional information in the following table, (a) calculate the absorbance at 430 nmand 600 nm for the following indicator concentrations: 3.00 10-4M,2.00 10-4M, 1.00 10-4M, 0.500 10-4 M, and 0.250 10-4M. (b) plot absorbance as a function of indicator concentration.
Could you help me with the questions needed to start these two questions. I’m a little confused on where to begin.
calculate the [FESCN2+] using volumes of stock solutions. Presume that all of the SCN- ions react. Next, record the light absorbance values of each standard solution. Volume Volume Volume [FESCN2+] Absorbance Standard Fe(NO3)3 SCN- H2O sample (mL) (mL) (mL) 1 2.50 2.00 20.50 0.1811 2 2.50 1.50 21.00 0.3219 2.50 1.00 21.50 0.4981 4 2.50 0.50 22.00 0.6328 Stock [Fe(NO3)3] = 0.200 M, Stock [SCN-] = 0.0020 M. %3D
Do not give handwriting solution.
30
i: increase or decrease? ii:①0.01/0.02/0.03/0.04/0.05/0.06 ②0.01/0.02/0.03/0.04/0.05/0.06/0.07 ③0.01/0.02/0.03/0.04/0.05/0.06/0.07/0.08
3. The chemical sunset yellow, also known as yellow #6, looks yellow. What color(s) must be absorbed by this chemical? RED YELLOW GREEN WHITE CYAN MAGENTA RGB System (Transmitted light) Additive color syslem colored light Rendered with Corel Dro RGB pollete BLUE-VIOLET 4. Sunset yellow has an extinction coefficient of 20,000 M-1 cm-l at a lambda max of 470 nm. What is the concentration of a solution that has an absorbance of 0.893?
1
B 50ng/ml C500 ng/ml
Calculation 1: Initial concentration of hexaaquacobalt(II) ion: 0.022M Calculation 2: Initial concentration of Chloride ion: 5.037M Calculation 3: At 293k CoCI4^4 eq is 9.06x10^-5M|| At 315k CoCl4^-4 eq is 3.00x10^-4M At 326k CoCI4^-4 eq is 5.14x10^-4M At 335 CoCI4^-4 eq is 6.88x10^-4M At 346 CoCI4^-4 eq is 1.01x10^-3M 4. [Co(H20)62*]eq and [Cl-Jeq - equilibrium concentrations Construct an ICE table using the initial concentrations hexaaquacobalt(II) and chloride ions from Calculations #1 and # 2, and final (equilibrium) concentration of the tetrachlorocobaltate(II) ion from Calculation #3. Use the table to determine the final equilibrium concentrations of the hexaaquacobalt(II) and chloride ions.
Please answer A & B pH See full Question.
Buffer Acetic Acid Sodium Acetate Calculated Observed System ID Volume of ~0.50 M HC2H3O2 (mL) Volume of ~0.50 M NaC2H3O2 (mL) pH pH 1 30 3 2 24 6 3 15 15 4 6 24 5 3 30