Data Sheet: Investigation of Nickel and Copper Coordination ComplexesPart B: The Coordination Number of Ni²*Mass of Ni(NO,),.6H,0_ 2. 3429Volume of Deionized H,0 45.6Concentration of Ni²* SolutionMoles Ni+TRIAL #Initial Temperature Final Temperature greactionAH.reaction-20.5021.6222.643.23-5824.454.24.4525.2526.1525.91Average Bond EnergyCoordination Number of Ni+

ata Sheet: Investigation of Nickel and Copper Coordination Complexes art B: The Coordination Number of Ni²+ Tass of Ni(NO,),.6H,0 2.3429 Volume of Deionized H,0 45. 6 Concentration of Ni?* Solution Moles Ni?+ TRIAL # Initial Temperature Final Temperature greaction 20.50 reaction- 22.64 22. 64 23.58 85-Eで 24.45 24.45 26.15 8. 25.91 ८०१४ 2 5.91 8858 Average Bond Energy Coordination Number of Ni'+

ata Sheet: Investigation of Nickel and Copper Coordination Complexes art B: The Coordination Number of Ni²+ Tass of Ni(NO,),.6H,0 2.3429 Volume of Deionized H,0 45. 6 Concentration of Ni?* Solution Moles Ni?+ TRIAL # Initial Temperature Final Temperature greaction 20.50 reaction- 22.64 22. 64 23.58 85-Eで 24.45 24.45 26.15 8. 25.91 ८०१४ 2 5.91 8858 Average Bond Energy Coordination Number of Ni'+

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter14: Applications Of Ultraviolet-visible Molecular Absorption Spectrometry

Section: Chapter Questions

Problem 14.17QAP

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The red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured. a)What is the effect on the reported concentration of iron in the sample if there is a trace impurity of Fe2+in the ammonium citrate?
The red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured. a)Use the data table below to prepare a calibration curve (absorbance versus concentration in ppm). Fit the data to straight line and find the equation for the straight line and the R2 value. (Hint: Think about what to do with the absorbance of the blank.)
. A student collects the following data for the absorbance of a complex measured in 1.00 cmspectrophotometric cells. The molar absorptivity (ε) of the complex under investigation is 2.25×103L/mol·cm. Calculate the concentration of the complex in solution at each time of the reaction.Time (min)MeasuredAbsorbanceComplex Concentration(M)0.000 1.50010.000 1.31320.000 1.12530.000 0.93840.000 0.750
Nickel bis-dimethylglyoximate complex was deposited with a weight of (4.869g) with the filter paper from the base medium from adding (10ml) of hot DMG to a salt of nickel chloride at weight (0.78g), find the percentage of nickel ion. Note that the weight of the filter paper (1.30g). At.Wt.: Ni= 58.69 g/mol, C= 12 g/mol, O=16 g/mol, H=1 g/mol, N=14 g/mol
Scott test is one of the methods used for screening for Cocaine in Forensic Chemistry. The multi step method consists of a) reacting the sample drug with cobaltous thiocyanate b) dissolving of the formed precipitate by adding HCl and c) extraction of coordination compound with Chloroform d) measurement of absorbance of extracted coordination compound at 627 nm All the reactions in this multistep method are not fully understood. However, it was determined that there are 2 moles of cocaine in coordination compound measured in last step. If coordination compound is represented as “Scott” coordination compound, which of the following is correct “stoichiometric” factor to get mass of cocaine from mass of measured complex ? a.g (Scott coordination cpd) * MM (Scott coordination cpd) MM (cocaine) b.g (Scott coordination cpd) * 2 *MM (Scott coordination cpd) MM…
according to Werner, which valency is not ionisable in a complex compound, primary or secondary ?
The following data were obtained on the initial rates of reaction of a d-metal complex in aqueous solution. For the experiments a. [Y] = 2.7 mmol/dm3, and for experiments b. [Y] = 6.1 mmol/dm3 Conc. complex/(mmol dm-3) 8.01 9.22 12.11 Exp. a. v/ (mol dm-3 s-1) 125 144 190 Exp. b.   v/ (mol dm-3 s-1) 640 730 960 (a) What is the order of reaction with respect to the complex AND the reactant Y. Choose one. (b) use the data above to calculate the rate constant. k = ________ (mol/L/s, s-1, L/mol/s, or L2/mol2/s). 3 s.f. normal format.
The following data were obtained on the initial rates of reaction of a d-metal complex in aqueous solution. For the experiments a. [Y] = 2.7 mmol/dm3, and for experiments b. [Y] = 6.1 mmol/dm3 Conc. complex/(mmol dm-3) 8.01 9.22 12.11 Exp. a. v/ (mol dm-3 s-1) 125 144 190 Exp. b.   v/ (mol dm-3 s-1) 640 730 960 (a) What is the order of reaction with respect to the complex AND the reactant Y. (b) use the data above to calculate the rate constant. k = ________ (mol/L/s, s-1, L/mol/s, or L2/mol2/s). 3 s.f. normal format.
The following data were obtained on the initial rates of reaction of a d-metal complex in aqueous solution. For the experiments a. [Y] = 2.7 mmol/dm3, and for experiments b. [Y] = 6.1 mmol/dm3 Conc. complex/(mmol dm-3) 8.01 9.22 12.11 Exp. a. v/ (mol dm-3 s-1) 125 144 190 Exp. b.   v/ (mol dm-3 s-1) 640 730 960 (a) What is the order of reaction with respect to the complex AND the reactant Y. Choose one.
5. Calculate the Ionic strength of solution prepared by mixing of 0.2 M NaNO3and 0.02M of K2Cr2O7:a) s = [Ksp / 27]1/5 b) s = Ksp1//5c) s = Ksp ½ d) s = [Ksp/108]1/5e) s = 108 Ksp
Ag+ + ligand L --> Ag_ligandL_Complex K_bind = ??? The virtual lab below contains a 1.00M flask of 'Ligand L' along with a bottle of solid silver chloride. Perform an experiment in the virtual lab to determine the binding constant for this ligand (K_bind for the above reaction). ou will need to use your knowldedge of solubility to determine tthe binding constant. The Ksp for Silver Chloride is: 1.830e-10. Agcl 0.971351 What is the binding constant for this ligand (Please use three significant figures for your answer)
Which statement is true regarding interligand charge-transfer (ICT or LL'CT) complexes? Group of answer choices In an ICT transition, an electron is promoted from a pi-acceptor ligand orbital to one on a pi-donor ligand ICT transitions are only observed for complexes that have tetrahedral geometries The metal center plays the most influential role an ICT transition For a given complex, the ICT molar absorptivity is at its maximum when the pi-donor and pi-acceptor ligands are co-planar