Gravimetric Problems OH N* + 2 + 2H* ÓH DMG FM 116.12 Bis(dimethylglyoximate)nickel(II) FM 288.91 FM 58.69 If the nickel content is known to be near 3 wt% and you wish to analyze 10.0 g of steel, what volume in ml of 11.0 wt% alcoholic DMG solution should be used to give a 50% excess of DMG for the analysis? Assume that the density of the alcohol solution is 0.79 g/mL.

Gravimetric Problems OH N* + 2 + 2H* ÓH DMG FM 116.12 Bis(dimethylglyoximate)nickel(II) FM 288.91 FM 58.69 If the nickel content is known to be near 3 wt% and you wish to analyze 10.0 g of steel, what volume in ml of 11.0 wt% alcoholic DMG solution should be used to give a 50% excess of DMG for the analysis? Assume that the density of the alcohol solution is 0.79 g/mL.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter26: Molecular Absorption Spectrometry

Section: Chapter Questions

Problem 26.15QAP

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Potentially Useful Information Spectrochemical Series: | < Br < SCN < Cl° < NO3¯< F° < OH° < C2O4²- ~ H2O < NCS < NH3 < en < PPH3 A student synthesizes and isolates the following coordination compound [Ni(H2NCH2CH2NH2)3]Cl2 (molar mass = 309.8966 g/mol) according to the balanced reaction below. In the experiment, the student reacts 2.500 g of nickel (II) chloride hexahydrate (molar mass = 237.6878 g/mol) with 4.000 g of ethylenediamine (molar mass = 60.0992 g/mol). After isolating the product, the student collects 3.200 g of the nickel coordination compound. NICI2•6H2O (aq) + 3H2NCH2CH2NH2 (1) → [Ni(H2NCH2CH2NH2)3]Cl2 (s) + 6H2O (1) Given the transition metal compound, Na4[Co(C204) (CN)4], what is the oxidation state of cobalt, as well as the coordination number of cobalt in this compound? This compound is soluble in water. The oxidation state of cobalt is Cobalt has a coordination number of Your answer should be an integer.
Potentially Useful Information Spectrochemical Series: | < Br < SCN < Cl° < NO3¯< F° < OH° < C2O4²- ~ H2O < NCS < NH3 < en < PPH3 A student synthesizes and isolates the following coordination compound [Ni(H2NCH2CH2NH2)3]Cl2 (molar mass = 309.8966 g/mol) according to the balanced reaction below. In the experiment, the student reacts 2.500 g of nickel (II) chloride hexahydrate (molar mass = 237.6878 g/mol) with 4.000 g of ethylenediamine (molar mass = 60.0992 g/mol). After isolating the product, the student collects 3.200 g of the nickel coordination compound. NICI2•6H2O (aq) + 3H2NCH2CH2NH2 (1) → [Ni(H2NCH2CH2NH2)3]Cl2 (s) + 6H2O (1) What is the limiting reactant in the reaction above? In this reaction, the limiting reactant is... O ethylenediamine O nickel (II) chloride hexahydrate O This reaction is stoichiometric, so there is no limiting reactant.
Solution for 0.105g of the K3[Fe(C2O4)3] (MW= 437.2 g/ mol) were dissolved in sulfuric acid and got rated with 9 mL of 0.028M KMn04. What is the experimental weight percent of oxalate in the sample?
es> (1_101232)(2) 4e č eljas > 25 April -1 May > MidExam-28-4-2021 me Calendar Badges All courses Course dashboard Time left 0:31:53 Match the oxidation state of the coordinated metal center which pair is incorrect ? O a. [ScCl ; +3 O b. K[Cu(CN)2li+1 Oc. (Cr(C204); +3 O d. (Fe(CN): +3 TOSHIBA 144 8. 4. 6 8 A 9 R Y ! U P DI F HiJ K BYNI ALT CTRL GR
Gold can be determined in solutions containing high concentrations of diverse ions by ICP. Aliquots of 50.0 mL of the sample solution were transferred to each of four 100.0 mL volumetric flasks. A solution was prepared containing 10.0 mg/L Au in 20% H2SO4, and quantities of this solutions were added to the sample solution to give 0, 2.5, 5 and 10 mg/L added Au in each of the flask. The solutions were made up to a total volume of 100.0 mL, mixed and analyzed by ICP. The resulting data are presented in the following table: Added Au (mg/L) Emission Intensity (Counts) 0.0 12568 2.5 19324 5.0 26622 10.0 40021 a) Attach an excel graph for the determination showing the X intercept. b) Calculate the concentration of gold in the sample, report with its uncertainty. c) The known concentration of gold in the sample is 8.51 mg/L. Test the hypothesis that your result is equal to this value at the 95% confidence level. l
Experiment 'systhesis and analysis on a potassium trioxalatoaluminate (III) trihydrate complex, K3[Al (OX)3].3H2O' . ReagentsAluminium can, potassium hydroxide, oxalic acid, ethanol 95%, acetone, KMnO4 solution 3.2 g/L, H2SO4 acid 0.1 M and NaOH 0.1 MApparatus100 mL Beaker, 25 mL measuring cylinder, Bunsen burner, Buchner filter, filter paper, hotplate, glass rod, petri dish, test tube, 100 mL volumetric flask, thermometer, 250 mL conical flask. My question is, what is the summary of this experiment?
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0.105g of the K3[Fe(C2O4)3] (MW= 437.2 g/mol) were dissolved in sulfuric acid and got rated with 9 mL of 0.028M KMn04. What is the experimental percent of oxalate in the sample?
< 7:31 tetrachloronickelate(II) ([Ni(CI) 4]²-)? 1 What is the coordination number around the central metal atom in 4 7 +/- Question 24 of 28 2 5 8 3 6 9 O il 484 Tap here or pull up for additional resources Submit X с x 100