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Properties of H 2 O

Properties of H 2 O. KEY CONCEPT Water’s unique properties allow life to exist on Earth. _. O. H. H. +. +. Life depends on hydrogen bonds in water. Water is a polar molecule. Polar molecules have slightly charged regions. Nonpolar molecules do not have charged regions.

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Properties of H 2 O

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  1. Properties of H2O

  2. KEY CONCEPTWater’s unique properties allow life to exist on Earth.

  3. _ O H H + + Life depends on hydrogen bonds in water. • Water is a polar molecule. • Polar molecules have slightly charged regions. • Nonpolar molecules do not have charged regions. • Hydrogen bonds form between slightly positive    hydrogen atoms and slightly negative atoms.

  4. Hydrogen bonds are responsible for three important properties of water. • high specific heat • cohesion • adhesion

  5. solution Many compounds dissolve in water. • A solution is formed when one substance dissolves in another. A solution is a homogeneous mixture. • Solvents dissolve other substances. • Solutes dissolve in a solvent.

  6. Polar solvents dissolve polar solutes. • Nonpolar solvents dissolve nonpolar solutes. • Polar substances and nonpolar substances generally remain separate. • “Like dissolves like.”

  7. stomach acid pH between 1 and 3 more acidic Some compounds form acids or bases. • An acid releases a hydrogen ion when it dissolves in water. • high H+ concentration • pH less than 7

  8. pure water pH 7 A neutral solution has a pH of 7.

  9. bile pH between 8 and 9 more basic • low H+ concentration • pH greater than 7 • A base removes hydrogen ions from a solution.

  10. Properties of water video clip (20min) • http://player.discoveryeducation.com/index.cfm?guidAssetId=28AC1CDC-7403-46E0-9AF1-2B6F607D35F0&blnFromSearch=1&productcode=US

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