Ologies with Alie Ward Disinfectiology (BLEACH) with Evan Rumberger
Jul 16, 2019
Bleach scientist Evan Rumberger discusses the science of bleach, its history, uses, and misconceptions. Topics include tie-dye for goths, pool chlorination, stain removal, and partnerships for safe water. Learn about the impact and versatility of bleach in daily life.
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How Bleach Is Made
- Bleach (sodium hypochlorite) is produced by electrolysis of saltwater, which creates chlorine that reacts with sodium hydroxide to form NaOCl.
- Household "chlorine" bleach contains sodium hypochlorite, not elemental chlorine, despite the name.
No Free Chlorine In Your Bleach
- The term "chlorine bleach" is historical; commercial household bleach contains sodium hypochlorite instead of free chlorine gas.
- Sodium hypochlorite's chemistry (chlorine attached to oxygen) makes it distinct from elemental chlorine gas.
Bleach Traveled From 18th-Century Labs To Space
- Bleach was used on Apollo missions to disinfect spacecraft cabins and water systems after astronauts returned from space.
- Its long history ranges from textile bleaching in 1785 to protecting astronauts, showing broad utility.