Chamber crystals

T o show: The bleaching of a red rose by reduction a Ion with SO1 gas, and restoration of t,he color by oxid t' with HN03. Materials: Xed EtOH extract...
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Tested Overhead Proiection Series Compiled by HUBERT N. ALYEA

Princeton University

19. GROUP VI. THE SULFUR FAMILY

D. Sulfur Dioxide (continued) Dem. 571-Reducing

with SOzin G- 1

Experiment developed blj Crosby U . Rogers. T o show: Reducing action of SO2 on I