Tungsten trioxide (Wo,) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase for its Wo, content, a 10.11 g sample of the vase was ground and reduced with Ph(Hg) to convert any WO, to W. The resulting w* was transferred to 500.0 ml. of 1.00 M HCI. A 100.00 ml. aliquot of the HCI solution required 13.18 ml of 0.08251 M potassium permanganate (KMNO,) to reach the purple endpoint. A blank required 0.15 ml. Balance the redox reaction. redox reaction: MnO, + w* Mn+wo? Determine the percent wo, in the ceramic sample. percent WO,:

Tungsten trioxide (Wo,) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase for its Wo, content, a 10.11 g sample of the vase was ground and reduced with Ph(Hg) to convert any WO, to W. The resulting w* was transferred to 500.0 ml. of 1.00 M HCI. A 100.00 ml. aliquot of the HCI solution required 13.18 ml of 0.08251 M potassium permanganate (KMNO,) to reach the purple endpoint. A blank required 0.15 ml. Balance the redox reaction. redox reaction: MnO, + w* Mn+wo? Determine the percent wo, in the ceramic sample. percent WO,:

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

Calculate the pH of a solution that is 0.100 M in Fe(NO3)3.
Nickel can be precipitated by the :following precipitating agent Tinchloride .a Sodium tetraphenylborone .b o Hydrogen .c Dimethylglyoxime .d o НСООН .е
A) Define the “common ion effect”. B) Give an example using chemical formulas.
A 30.2 mL sample of a 0.325 M aqueous nitrous acid solution is titrated with a 0.255 M aqueous sodium hydroxide solution. What is the pH after 14.7 mL of base have been added?pH =
A 2.05g sample of a pure compound with a formula MCl2 is dissolved in water and treated with excess sulfuric acid. A 2.30 g precipitate of MSO4 is formed. 11.60ml of a 0.850M H2SO4 solution is required to completely precipitate the metal M into MSO4 Determine the molar mass and identity of M.
2. An effluent waste stream contains 3300mg/L organic matter ((CH2O) suspended and dissolved) and 27mg / L ammonium ion NH4+ (as N). Write chemical equations for the complete oxidation of (CH2O) and NH4+ and calculate the total BOD of this effluent in mg/L O2
You want to separate Cd2* and Fe2+ (initial concentration 103 mol/L) by means ofprecipitation of the corresponding sulphides. Is therea pH range in which one of the two metals is precipitated quantitatively(concentration in the solution less than or equal to 10" mol/L) is precipitatedwhile the other is still completely_in solution?Calculate and name this pH range where pH values below 0are set equal to O. Illustrate the situation graphically by drawing
2. Review relevant class materials and answer the following questions: You are given a solution that may be either NaCl(aq) or Na2CO3(aq). Present a scheme to find which substance was present in the solution. а. b. Complete and balance the following equations and explain your results. BaCl, (aq)+ H,SO,(aq)→ , AGNO, (aq)+CI (aq) →.
A buffer solution is prepared from a generic weak acid "HG" and the salt KG. The K, for HG is 3.7 x 106. What (net) chemical reaction will occur when HNO, is added to the busfer solution? O No reaction will occur. The buffer prevents reaction. O KG + HG + HNO, HKG+ + HNO,G- G-+ H3O' --> HG + H2O O HG + NO, -> HNO3 + G O HG + H3O --> H2G" + H2O
a solution prepared by dissolving 0.2541g sample of electrolytic iron wire in acid was passed through a jones reductor. The iron (II) in the resulting solution required 36.76mL of the titrant Cr2O7 2-. What is the molar concentration of the Cr2O7- titrant?
- A 0.6842-g sample of potassium hydrogen phthalate was dissolved in 50 mL of deionized water and titrated to a phenolphthalein end- point with 17.28 mL of Ca(OH), solution. What is the molarity of the Ca(OH),?
Discuss solubility and how that impacts the removal of copper corrosion.