1 / 10

Properties of Water

Properties of Water. Hydrogen bonding. Surface tension. Ice, water, vapor. Hydrogen bonding (electric attraction). Ice. Liquid. Water-soluble protein. “Dissociation” of water. pH. [H+]= 10 -1 M. pH = – log [H+]. Log scale means 10X change per unit!. [H+]= 10 -9 M. Buffers.

Samuel
Download Presentation

Properties of Water

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Properties of Water

  2. Hydrogen bonding

  3. Surface tension

  4. Ice, water, vapor

  5. Hydrogen bonding (electric attraction) Ice Liquid

  6. Water-soluble protein

  7. “Dissociation” of water

  8. pH [H+]= 10-1M pH = – log [H+] Log scale means 10X change per unit! [H+]= 10-9 M

  9. Buffers • Buffers resist changes to the pH of a solution when H+ or OH- is added to the solution. • Buffers accept hydrogen ions from the solution when they are in excess and donate hydrogen ions when they have been depleted.

  10. Overall lessons: • Many properties of water are emergent properties due to hydrogen bonding. • The cohesion of water molecules to each other is exploited by plants and animals. • Water resists temperature changes by absorbing lots of heat. • Lower density of ice causes it to float & insulate the water below. • The polarity of water allows it to dissolve other polar molecules. • Non-polar compounds are hydrophobic and not easily dissolved in water. • A mole of a compound has a constant # of molecules. • Adding or removing hydrogen ions changes the pH of a solution. • Buffers resist pH changes by accepting or donating H ions when [H+] changes.

More Related