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Phosphorus pentoxide reacting with water

K004/0793

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Credit

RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY

Caption

High-speed footage of water being poured on a watch glass containing dry phosphorus pentoxide. Phosphorus pentoxide is a powerful dehydrating agent, which reacts exothermically with water, giving off so much heat that some water is lost as steam. The reaction produces phosphoric acid. Phosphorus pentoxide is such a powerful dehydrating agent that it is used to remove water even from molecules to which the oxygen is tightly bound, such as amides, which feature a carbon-oxygen double bond.

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Clip Properties:

  • Duration: 00:03:05.18
  • Audio: No
  • Interlaced: Yes
  • Capture Format: Sony FS700
  • Codec: H.264

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