1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample inconcentrated HCl, giving a mixture of Fe²+ and Fe+. After adding HNO3 to oxidize any Fe2+to Fe+, the resulting solution was diluted with water and the Fe precipitated as Fe(OH)3by adding NH3. After filtering and rinsing, the residue was ignited, resulting to 0.8525 g ofpure Fe2O3. Calculate the:a) % (w/w) Feb) % (w/w) Fe;O4 in the sample.

A numerical problem based on isolation of metals, which is to be accomplished.

Answered: 1. A sample containing magnetite,…

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

Similar questions

3. A 4.912-g sample of a petroleum product was burned in a tube furnace, and the SO2 produced was collected in 3% H₂O₂. Reaction: SO2(g) + H₂O2 → H₂SO4. A 25.00-mL portion of 0.00873 M NaOH was introduced into the solution of H₂SO4, following which the excess base was back-titrated with 15.17 mL of 0.01102 M HCI. Calculate the sulfur concentration in the sample in parts per million.
A 4.908-g sample of a petroleum product was burned in a tube furnace, and the SO2 produced was collected in 2% H2 O2. Reaction: SO2 (g) + H2O2 → H2SO4 A 27.00-mL portion of 0.00826 M NaOH was introduced into the solution of H2 SO4, following which the excess base was back-titrated with 15.15 mL of 0.01165 M HCl. Calculate the sulfur concentration in the sample in parts per million. Concentration ppm
A 185.0 mL sample of 1.200 M Pb(NO₃)₂ is mixed with 52.50 mL of 1.500 M NaCl, and the PbCl₂ precipitate is filtered from the solution. Then 200.0 mL of 3.000 M NaBr is added to the remaining solution, and the PbBr₂ precipitate is also collected and dried. What is the mass (in grams) of the PbBr₂ precipitate, assuming the yield in each precipitation step is 100%?
A 185.0 mL sample of 1.200 M Pb(NO₃)₂ is mixed with 97.50 mL of 1.500 M NaCl, and the PbCl₂ precipitate is filtered from the solution. Then 200.0 mL of 3.000 M NaBr is added to the remaining solution, and the PbBr₂ precipitate is also collected and dried. What is the mass (in grams) of the PbBr₂ precipitate, assuming the yield in each precipitation step is 100%?
0.683 grams of iron mineral dissolves with acid. Fe2+ is titrated with Ce(SO4)2 solution. Calculate the percentage of iron since 38.5 mL of 0.161 M titrant is consumed in the titration (Fe:56 g/mol)
2+ A solution contains 0.0410 M Ca and 0.0900 M Ag. If solid Na3PO4 is added to this mixture, which of the phosphate species would precipitate out of solution first? Ca3(PO4)2 Ag3PO4 Na3PO4 When the second cation just starts to precipitate, what percentage of the first cation remains in solution? percentage: 13.41 Incorrect
The reaction of hydroxylamine and Fe(III) produces nitrous oxide, Fe(II) and water: 2H2NOH + 4Fe3+  N2O(g) + 4Fe2+ + 4H+ + H2O. A 50 ml sample of hydroxylamine was treated with Fe(III) solution and the released Fe(II) was titrated with 0.0325 M K2Cr2O7 solution, which consumed 19.83 ml. Calculate the hydroxylamine concentration of the sample.
2. To standardize a solution of NaOH, a student measured 0.326 g of potassium hydrogen phthalate (KHC8H404 or KHP) and dissolved it in 50.0 mL of water. To the solution, two drops of phenolphthalein indicator was added. To reach the equivalence point as indicated by endpoint of the titration where the solution retained a pale pink color, a volume of 15.3 mL was required. What is the molarity of the NaH solution? (KHP is a monoprotic acid that furnishes one H* ion; at the equivalence point, mols OH (base) = mols H* (acid))
A solid sample of Zn1OH22 is added to 0.350 L of 0.500 Maqueous HBr. The solution that remains is still acidic. It isthen titrated with 0.500 M NaOH solution, and it takes 88.5mL of the NaOH solution to reach the equivalence point.What mass of Zn1OH22 was added to the HBr solution?
If 30.0 g of LiOH is added to 0.650 L of 1.00 M Cd(NO₃)₂, how many grams of precipitate will be formed in the following precipitation reaction? a) Write a balanced equation. Identify a precipitate. Include states of matter. b) Determine how much precipitate would form if all reactant 1 ( LiOH) would be used up. c) Determine how much precipitate would form if all reactant 2 ( Cd(NO3 )2 would be used up. d) State Limiting reactant , and theoretical yield ( in grams) of the precipitate that would form from the given amounts.
When Steel wool was added to a blue-colored CuCl2 solution, the color of the solution gradually changed from blue to yellow. At the same time, there is some red solid covering the steel wool. What is the identity of the red solid on steel wool? A) Neutral Cu metal B) an iron oxide C) Precipitate of Fe(OH)2 or Fe(OH)3 D) Cu2+ ion
A solid sample containing some Fe2+ion had a total mass of .9791 g. It required 18.2 ml of 0.02304 M KMnO4 to titrate the Fe2+ in the dissolved sample to a pink endpoint. How many moles of Fe2+ were in the the sample? How many grams of irion were present in the sample and what was the mass percent iron in the sample?

SEE MORE QUESTIONS

Recommended textbooks for you

Chemistry

ISBN:

9781305957404

Author:

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

Publisher:

Cengage Learning

Chemistry

ISBN:

9781259911156

Author:

Raymond Chang Dr., Jason Overby Professor

Publisher:

McGraw-Hill Education

Principles of Instrumental Analysis

Chemistry

ISBN:

9781305577213

Author:

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

Publisher:

Cengage Learning

Chemistry

ISBN:

9781305957404

Author:

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

Publisher:

Cengage Learning

Chemistry

ISBN:

9781259911156

Author:

Raymond Chang Dr., Jason Overby Professor

Publisher:

McGraw-Hill Education

Principles of Instrumental Analysis

Chemistry

ISBN:

9781305577213

Author:

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

Publisher:

Cengage Learning

Organic Chemistry

Chemistry

ISBN:

9780078021558

Author:

Janice Gorzynski Smith Dr.

Publisher:

McGraw-Hill Education

Chemistry: Principles and Reactions

Chemistry

ISBN:

9781305079373

Author:

William L. Masterton, Cecile N. Hurley

Publisher:

Cengage Learning

Elementary Principles of Chemical Processes, Bind…

Chemistry

ISBN:

9781118431221

Author:

Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard

Publisher:

WILEY

SEE MORE TEXTBOOKS