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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
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
Chapter4: Types Of Chemical Reactions And Solution Stoichiometry
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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 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:
Transcribed Image Text: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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