The Properties of Water

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The Properties of Water

• Which Are Essential to the Maintenance of Life

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I. Properties of water are dependent on hydrogen
bonding
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II. Properties of water

• A. Cohesion
• 1. Definition
• 2. Example

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II. Properties of Water

• B. Adhesion
• 1. definition
• 2. example of old car hood

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II. Properties of Water

• C. Surface tension
• 1. Definition
• 2. Example

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Water strider on pond surface
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Capillarity

• 1. Definition
• 2. Example
• 3. Importance

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E. Specific heat

• 1. definition
• 2. specific heat of water is 1cal/gram/oC
• 3. specific heat of alcohol is .6cal/gram/oC
• 4. specific heat of water is 2X alcohol
• 5. analogy of kids in mall

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F. Heat of vaporization

• Definition
• Water has a heat of vaporization of 580 cal/gram
• Alcohol heat of vaporization is 290 cal/gram

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G. Density changes with temperature

• Definition of density

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G. Density changes with temperature

• Graph of density changes

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H. Water as a solvent of ionic molecules causes
dissociation
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H. Water also dissolves molecules which are
hydrophilic almost irregardless of size
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I. Water dissociates a little bit very small
percentage
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1. At neutral pH the H2O ? H OH-

• The concentration of hydrogen and hydroxyl ion
  are equal.
• The product of the two when multiplied together
  is always equal to 10-14

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2. Acid

• a. definition
• b. examples
• c. what happens to relative concentration of
  hydrogen and hydroxyl ion

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Base

• a. definition
• b. examples
• c. what happens to hydrogen and hydroxyl ion
  concentrations

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4. pH scale