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In some old European churches, the stained-glass windows have so darkened from corrosion and age that hardly any light comes through. Microprobe analysis showed that tiny cracks and defects on the glass surface were enriched in insoluble Mn(III) and Mn(IV) compounds. From Appendix E, suggest a reducing agent and conditions that might suc- cessfully convert these compounds to soluble Mn(II) with- out simultaneously reducing FelIID) (which gives the glass

In some old European churches, the stained-glass windows have so darkened from corrosion and age that hardly any light comes through. Microprobe analysis showed that tiny cracks and defects on the glass surface were enriched in insoluble Mn(III) and Mn(IV) compounds. From Appendix E, suggest a reducing agent and conditions that might suc- cessfully convert these compounds to soluble Mn(II) with- out simultaneously reducing FelIID) (which gives the glass

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 87AP: In some old European churches, the stained-glass windowshave so darkened from corrosion and age that...
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87. In some old European churches, the stained-glass windows have so darkened from corrosion and age that hardly any light comes through. Microprobe analysis showed that tiny cracks and defects on the glass surface were enriched in insoluble Mn(III) and Mn(IV) compounds. From Appendix E, suggest a reducing agent and conditions that might suc- cessfully convert these compounds to soluble Mn(II) with- out simultaneously reducing Fe(III) (which gives the glass its colors) to Fe(II). Take MnO, as representative of the insoluble Mn(III) and Mn(IV) compounds.
Transcribed Image Text:87. In some old European churches, the stained-glass windows have so darkened from corrosion and age that hardly any light comes through. Microprobe analysis showed that tiny cracks and defects on the glass surface were enriched in insoluble Mn(III) and Mn(IV) compounds. From Appendix E, suggest a reducing agent and conditions that might suc- cessfully convert these compounds to soluble Mn(II) with- out simultaneously reducing Fe(III) (which gives the glass its colors) to Fe(II). Take MnO, as representative of the insoluble Mn(III) and Mn(IV) compounds.
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