To determine the concentration of these analyte ions in a mixture, the mixture absorbance is analyzed in a cell with a pathlength of 1.00 cm at  396  nm and at 550 nm, yielding values of 0.109 and 0.0.183, respectively. What is the molar concentrations of X3+ in the sample? What are the molar concentrations of Y2+ in the sample?

Q: A solution of a specific vitamin has a åmax of 271 nm and a concentration of 2.73 × 10-7M. The…

A: Given that : Concentration of the solution (C) = 2.73 x 10-7 M Absorbance of the solution (A) =…

Q: extinction coefficient = ε, path length = b, concentration C A sample containing an unknown…

A:

Q: Ni2+ appears green in solution, so its concentration can be determined spectrophotometrically.  A…

A: Since in absorbance v/s concentration plot, we plot the absorbance value in y axis and concentration…

Q: Which of two instrumental modes, atomic absorption or atomic emission, results in the better…

A: Atomic Absorption (AA) and Atomic Emission (AE) are both spectroscopic techniques used for the…

Q: The Keq for imidazole binding to hemoglobin can be determined from the following linear equation,…

A: Reciprocal of change in absorbance is plotted versus the reciprocal of imizdazole concentration.To…

Q: A mixture is prepared by combining 10.72 mL of 2.52 x 10-3 M Fe(NO3)3 with 10.00 mL of 1.76 x 10-3 M…

A: Given that: Initial concentration of Fe(NO3)3 is 2.52 x 10-3 M. Volume of Fe(NO3)3 solution is 10.72…

Q: A 50 ml sample of Ni2+ gave an absorbance of 0.455 in an atomic absorption analysis. Then 2.00 ml of…

A: Use the following equation. is the unknown initial concentration of analyte in the sample is the…

Q: Part C: Copper. A 0.275 M solution of Cu^2+ gives an absorbance reading of 0.788 at 620 nm. Another…

A: The concentration for given second solution is calculated by using Beer’s and Lambert’s law. The…

Q: The intensity of red light (680 nm) and sorted by a solution of green dye was found to be 1.99 V and…

A:

Q: A solution in part C initially contains (4.2100x10^-4) molar SCN¯ and (3.1700x10^-3) molar Fe3+.…

A:

Q: Sally obtains a standard calibration curve for their assigned food dye by plotting absorbance versus…

A: The objective of this question is to determine the concentration of the food dye in the original…

Q: The following absorbance values for four solutions with known MnO4 concentrations were measured…

A: A spectrophotometer is a device that is used to measure the intensity of the light that passes…

Q: The absorption coefficient of O2 in seawater at 0°C is 1.7 mmol/L.What is the concentration of O2 if…

A: Given information,        The absorption coefficient of O2 in seawater at 0°C is 1.7 mmol/L.

Q: A never circulated 1975 penny with a mass of 3.00 g was dissolved in concentrated nitric acid, the…

A: Absorbance is plotted on y-axis and concentration is plotted on x-axis. Mass of penny dissolved in…

Q: The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate…

A: Given the linear regression equation for the analysis of the standard solution is Y =…

Q: A student combines Fe(NO3)3 solution and KSCN solution to produce a solution in which the initial…

A: The objective of this question is to determine the equilibrium constant (Kc) for the reaction Fe3+ +…

Q: For this experiment I prepared two solutions: each was an injection of 15 microliters of pure acetic…

A: 1 μL = 10-6 L 1 L = 1000 mL Volume of acetic anhydride (MW = 102.09 g/mol) taken in mL, V = 15.9 μL…

Q: Copper was determined in an alloy sample by UV-visible spectrophotometry. The standard addition…

A:

Q: As part of an investigation on Pb in biological ecosystems, some grasses that grew along the road…

A:

Q: The ultraviolet spectrum of aspirin shows a secondary absorption band at 271 nm. If a solution of…

A: The absorbing species obey Lambert beer law

Q: constant obtained in this experiment, calculate the absorbance of the solution of 0.0600 M CoCl2. My…

A: Absorbance=ECl  E is beers law constant  l =1

Q: A spectrophotometer was calibrated with a 7.236 x 10-4 M (in Cu) Cu-neocuproine solution. This…

A: The question is based on the concept of photochemistry. We need to calculate concentration of…

Q: You begin preparation of the calibration curve to measure absorbance vs concentration of FeSCN2+. To…

A: Molarity is the way of expressing concentrations which is defined as moles of solute dissolved per…

Q: A solution in part C initially contains (4.1000x10^-4) molar SCN¯ and (1.180x10^-1) molar Fe3+. This…

A: Given that: absorbance = 5.150×10-1  initial concentration of Fe3+ = 1.180×10-1 M initial…

Q: Ben ran through the experiment and found the best-fit line listed below for his standard calibration…

A: Given , absorbance of solution = 0.432  Volume of 0.002 M iron(III) nitrate = 5.00 mL Volume of…

Q: Sally obtains a standard calibration curve for their assigned food dye by plotting absorbance versus…

A: Step 1: Relate absorbance to concentration using the calibration curve equationThe calibration curve…

Q: A student combines Fe(NO3)3 solution and KSCN solution to produce a solution in which the initial…

A: The objective of this question is to determine the equilibrium constant (Kc) for the reaction Fe3+ +…

Q: Calculate the specific absorbance ratio (SAR), where A620 = 0.285 and A280 = 0.795. Enter your…

A: Specific Absorbance Ratio can be defined as Ratio of A280 to the A620 according the problem Asked…

Q: A 10 μL aqueous sample containing 1 attogram of Rb+ was injected into a graphite furnace atomic…

A: Given : Volume of solution = 10 μL = 0.01 mL                                 (since 1 mL = 1000 μL )…

Q: Calculate the equilibrium concentration of FeSCN^2 Please explain.

A: Given: Beaker [FeSCN+2] Absorbance 1. 1.6*10-4 M 0.582 2. 1.2*10-4 M 0.448 3. 0.8*10-4 M…

Q: A solution in part C initially contains (4.0300x10^-4) molar SCN¯ and (2.880x10^-3) molar Fe3+. This…

A: We have to calculate the equilibrium constant.

Q: Calculate the absorbance of the vitamin solution at 324 nm (sample pathlength = 1.00 cm)

A: ** This question can be solved with the help of Beer - Lambert's law  **Beer - lambert's law states…

Q: A solution in part C initially contains (4.06x10^-4) molar SCN and (2.960x10^-3) molar Fe3+. This…

A: Given the initial concentration values of the reactants: [SCN-(aq)]i = 4.06*10-4 M [Fe3+(aq)]i =…

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.