Tungsten trioxide (WO,) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase forits WO, content, a 10.29 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO, to W3+. The resultingW3+ was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 13.38 mL of 0.08377 M3.potassium permanganate (KMNO,) to reach the purple endpoint. A blank required 0.22 mL.Balance the redox reaction.MnO, + W3+Mn2+ + WO3+redox reaction:Determine the percent WO, in the ceramic sample.percent WO3:

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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 10.29 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO, to W3+. The resulting W3+ was transferred to 500.0 mL of 1.00 M HCI. A 100.00 mL aliquot of the HCl solution required 13.38 mL of 0.08377 M potassium permanganate (KMNO,) to reach the purple endpoint. A blank required 0.22 mL. Balance the redox reaction. MnO, + W3+ Mn2+ + WO3+ redox reaction: Determine the percent WO, in the ceramic sample. percent WO3: %

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 10.29 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO, to W3+. The resulting W3+ was transferred to 500.0 mL of 1.00 M HCI. A 100.00 mL aliquot of the HCl solution required 13.38 mL of 0.08377 M potassium permanganate (KMNO,) to reach the purple endpoint. A blank required 0.22 mL. Balance the redox reaction. MnO, + W3+ Mn2+ + WO3+ redox reaction: Determine the percent WO, in the ceramic sample. percent WO3: %

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...

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

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 10.29 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO, to W3+. The resulting
W3+ was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 13.38 mL of 0.08377 M
3.
potassium permanganate (KMNO,) to reach the purple endpoint. A blank required 0.22 mL.
Balance the redox reaction.
MnO, + W3+
Mn2+ + WO3+
redox reaction:
Determine the percent WO, in the ceramic sample.
percent WO3:

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