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Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase for its WO3 content, a 10.27 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO3 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 11.80 mL of 0.08439 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the redox reaction. redox reaction: MnO+W3+ Mn² + + WO²+ Determine the percent WO3 in the ceramic sample. percent WO3: %

Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase for its WO3 content, a 10.27 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO3 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 11.80 mL of 0.08439 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the redox reaction. redox reaction: MnO+W3+ Mn² + + WO²+ Determine the percent WO3 in the ceramic sample. percent WO3: %

Chemistry
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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Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase for its WO3 content, a 10.27 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO3 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 11.80 mL of 0.08439 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the redox reaction. redox reaction: MnO+W3+ Mn² + + WO²+ Determine the percent WO3 in the ceramic sample. percent WO3: %
Transcribed Image Text:Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. To test a ceramic vase for its WO3 content, a 10.27 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO3 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 11.80 mL of 0.08439 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the redox reaction. redox reaction: MnO+W3+ Mn² + + WO²+ Determine the percent WO3 in the ceramic sample. percent WO3: %
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