A simultaneous determination of Co and Ni can be based on absorption by their respective 8-hydroxyquinolinol complexes. Molar absorptivities corresponding to their absorption maxima are as follows: 365 nm 700 nm Co 3529 |428.9 Ni 3228 |10.2 Calculate the molar concentration of Ni and Co in the following solution measured using 1.00 cm cell. Absorbance: 365 nm: 0.426 700 nm: 0.026

A simultaneous determination of Co and Ni can be based on absorption by their respective 8-hydroxyquinolinol complexes. Molar absorptivities corresponding to their absorption maxima are as follows: 365 nm 700 nm Co 3529 |428.9 Ni 3228 |10.2 Calculate the molar concentration of Ni and Co in the following solution measured using 1.00 cm cell. Absorbance: 365 nm: 0.426 700 nm: 0.026

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: The carbon-carbon bond length of coordinated ethylene in Ti(15-C5Me5)2(1²-C2H4) is 1.44 A, as…

Q: Use the following information to answer the question. Molar absorptivity data for the cobalt and…

A: Given , Cobalt and nickel complexes are dissolved together with 2,3-quinoxalinedithiol

Q: A student collects the following data for the absorbance of a complex measured in 1.00 cm…

A: Absorbance ( A ) = molar absorptivity ( ε) x concentration(c) x path length (l) or, A = εcl…

Q: An aqueous complex absorbs strongly at 528 nm. What color does the solution appear? 650 nm 580 nm R…

A: Given that, Absorb wavelength = 528 nm

Q: Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are εCo =…

A: The Absorbance for a solution is given as: A = € × b × c For two or more solutions, A = A1 + A2 +…

Q: Using the graph below to estimate the dissociation constant Kd, calculate the concentration of…

A: The smaller the value of dissociation constant (Kd) greater the binding affinity between the…

Q: Consider the UV-visible absorption spectra below for the pseudo-octahedral copper(II) complexes: ●…

Q: Consider the reactions below. Which of the following correctly identifies the coordinate complex?…

A: We have find out the answer.

Q: Predict the coordination geometry of Ir(CO)Br(PEt3)2 and justify your answer. Draw the structure of…

A: Here we have to predict the geometry of Ir(CO)Br(PEt3)2 and product of reaction of H2 with it and…

Q: Titanium(IV) and vanadium(V) form colored complexes when treated with hydrogen peroxide in 1 M…

A: According to Beer's law, the absorbance of a mixture is sum of each component represented as, A =…

Q: EDTA extracts bismuth(III) from the bismuth(III)-thiourea (Bi(tu) 3 +) complex according to the…

A: Spectrophotometric titration curves are used to analyze the progress of a titration reaction when at…

Q: We have a mixture of 100 mL of Fe3+ solution (1.00 × 10–3 M) and 100 mL of A- ion solution (1.00 ×…

A: We have find out the Balance the equations and the concentrations of the remaining species.Also find…

Q: 13. A complex ion has been observed which starts with a violet color with six aqua ligands attached.…

Q: Which of the following complex has the highest effective magnetic moment: K2MnO4 KMnO4 K2MnCl4…

A: The objective of the question is to determine which of the given complexes has the highest effective…

Q: b) Explain the trend in the IR stretching frequency, v(CO), for the metal carbonyl complexes below:…

A: Detailed explanation:-[Ti(CO)6]2−IR stretching frequency: 1748 cm⁻¹The titanium in [Ti(CO)6]2−…

Q: Indicate the (i) metal oxidation state, (ii) d- electron count, and (iii) the spin only magnetic…

Q: Give the systematic name for the following coordination compound: CI- .F Со

A: While naming any complex ion, the ligands are always named before the metal ion. If multiple ligands…

Q: A" forms a pink-yellow complex ion in solution at Amax = 396 nm, while a red-green complex of B" in…

A: A question based on calibration method that is to be accomplished.

Q: What is the CFSE of [Cr(NH3)6]2+ complex? Group of answer choices -0.8Δo -1.6 Δo -1.2 Δo -0.6…

Q: Give the systematic name for the following coordination compound or complex ion: FL F LL CI CI

A: The geometry of the given complex is square planar.

Q: A 0.402 g sample of a Ni(11) complex (molar mass of the complex is 294.96 g/mol) dissolved in 100.0…

A: Introduction: Beer-Lambert law: Beer-Lambert law shows the relationship between the absorbance and…

Q: Consider the reactions below. Which of the following correctly identifies the coordinate complex?…

Concept explainers

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.

Question

A simultaneous determination of Co and Ni can be based on
absorption by their respective 8-hydroxyquinolinol complexes.
Molar absorptivities corresponding to their absorption maxima are
as follows:
365 nm
700 nm
428.9
| 10.2
Co
3529
Ni
3228
Calculate the molar concentration of Ni and Co in the following
solution measured using 1.00 cm cell.
Absorbance:
365 nm: 0.426
700 nm: 0.026

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

A ligand (L) binds to a protein with a Kd value of 0.1x10-6 M. What percentage (%) of the proteins are bound if the free ligand concentration was measured at 100 nM?
Consider the solvatochromic complex, [Mo(bipy)(CO)4]. The complex has a MLCT peak in the UV-vis spectrum. This peak is at 533 nm in acetonitrile solvent and at 584 nm in benzene solvent. In a 50:50 acetonitrile:benzene mixture, the peak is at 559 nm. Is the mixture of acetonitrile and benzene immediately surrounding the [Mo(bipy)(CO)4] molecules less than, equal to, or greater than a 50:50 mixture (acetonitrile:benzene)? Justify your answer. (HINT: Do you need to convert the wavelengths to a more appropriate unit?)
Calculate the binding affi nity of a ligand for its receptor from the following data:
Explain the chelate effect using Fe3+ and EDTA as the ligand and Fe3+ and 6 ammonias as ligands and provide one product in which EDTA is found.
Mn(acac)3 was found to have its ground state to 1st excited state absorption at 500 nm (Δo). The pairing energy for this complex is 28,000 cm-1 . Based on this information, draw the populated ground state d orbital diagram for this complex.
Using the ligands ethylenediamine (H2NCH2 CH2NH2) and bromide anions, design a cationic chiral octahedral complex of cobalt(III) with a +1 charge. Draw the coordination complex with its enantiomer.
You measured the absorbance values at selected wavelengths for one of the complexes above. Record those values below, as well as the identity of your chosen complex. Determine your estimate for the wavelength of maximum absorbance (λmax), and show your calculations for the energy of d-orbital splitting, Δ. 0.10 M Ni(NO)2 : 10 drops approximately 0.50 mL Chosen complex: (Ethylenediamine) C2H4(NH2)2 + Ni(NO)2 (10 drops, hot temperature, light purple color) Wavelength (λ) nanometers Absorbance 400 nm 0.438 450 nm 0.047 500 nm 0.094 550 nm 0.184 600 nm -0.043 650 nm -0.066 700 nm -0.0125 750 nm -0.121 800 nm -0.218