WaterWater
HH22OO
2 hydrogen atoms, 12 hydrogen atoms, 1
oxygen atomoxygen atom
It’s a compoundIt’s a compound
WaterWater
Covalent compoundCovalent compound
Sharing valenceSharing valence
electrons (Veelectrons (Ve--
))
Sharing Ve...
WaterWater
““H” side tends to be pos.H” side tends to be pos.
““O” side tends to be neg.O” side tends to be neg.
Like t...
WaterWater
 Cohesion-Cohesion-
attraction ofattraction of
the liquidthe liquid
molecules tomolecules to
themselvesthemsel...
Adhesion-Adhesion-
attraction ofattraction of
the liquidthe liquid
molecules tomolecules to
otherother
moleculesmolecules...
Penny Surface
SurfaceSurface
TensionTension Pulling together of the surfacePulling together of the surface
molecules of a liquidmolecul...
Surface TensionSurface Tension
Water’sWater’s
surface hassurface has
a “skin”a “skin”
A smallA small
force will notforce...
Edge of
paperclip
SurfaceSurface
TensionTension
‼In glass, water curvesIn glass, water curves
up the sidesup the sides
‼MeniscusMeniscus
Water
Water
Water
Water
Water
Water
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Water

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Water

  1. 1. WaterWater HH22OO 2 hydrogen atoms, 12 hydrogen atoms, 1 oxygen atomoxygen atom It’s a compoundIt’s a compound
  2. 2. WaterWater Covalent compoundCovalent compound Sharing valenceSharing valence electrons (Veelectrons (Ve-- )) Sharing VeSharing Ve-- unequallyunequally
  3. 3. WaterWater ““H” side tends to be pos.H” side tends to be pos. ““O” side tends to be neg.O” side tends to be neg. Like tiny “magnets”Like tiny “magnets” PolarPolar
  4. 4. WaterWater  Cohesion-Cohesion- attraction ofattraction of the liquidthe liquid molecules tomolecules to themselvesthemselves
  5. 5. Adhesion-Adhesion- attraction ofattraction of the liquidthe liquid molecules tomolecules to otherother moleculesmolecules WaterWater
  6. 6. Penny Surface
  7. 7. SurfaceSurface TensionTension Pulling together of the surfacePulling together of the surface molecules of a liquidmolecules of a liquid  Water has high surfaceWater has high surface tensiontension
  8. 8. Surface TensionSurface Tension Water’sWater’s surface hassurface has a “skin”a “skin” A smallA small force will notforce will not break thebreak the “skin”“skin”
  9. 9. Edge of paperclip
  10. 10. SurfaceSurface TensionTension ‼In glass, water curvesIn glass, water curves up the sidesup the sides ‼MeniscusMeniscus

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